Best Calibration Setting Rings (Oct. 2026) - Rated by CherryPicks' Experts

At a Glance: Our Top Picks

Top 1

Master Setting Ring Gauge, Precision Calibration Smooth Hole Gauge for Bore M...

9.8
CPR Score
Top 2

Master Setting Ring Gauge, Precision Calibration Smooth Hole Gauge for Bore M...

9.8
CPR Score
Top 3

1-100mm Inner Diameter Calibration Gauge Setting Ring Gauge, GCR15 Bearing St...

9.7
CPR Score
Tips


Our team has selected the top 30 best Calibration Setting Rings. We found and analyzed dozens of products, analyzed & compared 306 Calibration Setting Rings with different brands, including Generic, Mitutoyo, SPI And INSIZE, and analyzed 32 consumer reviews for Test, Measure & Inspect products.

* CherryPicks.Reviews is reader-supported, Our editor review, and recommend the best products based on extensive data analysis, if you click on the product links, we may earn a commission through qualifying products purchased.

The Best Calibration Setting Rings Rated by CherryPicks

Market Overview
Calibration Setting Rings Reviewed
  • Reviews Analyzed: 32 Items
  • CPR Avg. Rating: 8.6 / 10
30 Products Evaluated
  • Highest Price: $483.00
  • Lowest Price: $12.93
  • Avg. Price: $99.76
Price Disclaimer

Top 30 Calibration Setting Rings on Amazon (Verified You can Buy)

Top 1

Master Setting Ring Gauge, Precision Calibration Smooth Hole Gauge for Bore Micrometer Internal Diameter Inspection, 0.002mm Tolerance, Wear-Resistant Measuring Tool for Machine Shop(20mm)

WsidQokfn
WsidQokfn

Ratings for WsidQokfn (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
KFLSYS - ❌ ❌ ❌

Features

1.This product is made of high quality steel.
2.The product has high hardness measuring surface, wear resistance and long service life.
Show More
Top 2

Master Setting Ring Gauge, Precision Calibration Smooth Hole Gauge for Bore Micrometer Internal Diameter Inspection, 0.002mm Tolerance, Wear-Resistant Measuring Tool for Machine Shop(5mm)

WsidQokfn
WsidQokfn

Ratings for WsidQokfn (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
KFLSYS - ❌ ❌ ❌

Features

1.This product is made of high quality steel.
2.The product has high hardness measuring surface, wear resistance and long service life.
Show More
Top 3

1-100mm Inner Diameter Calibration Gauge Setting Ring Gauge, GCR15 Bearing Steel Measuring Tool for Calibrating Inside Micrometers and Bore Gauges(1 pcs) (35 mm)

Generic
YH1031

Ratings for Generic (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
YLMYYXGS - ❌ ❌ ❌

Features

[GCR15 BEARING STEEL] Constructed from GCR15 bearing steel. This material provides structural stability and wear resistance for standard machining environments.
[CALIBRATION STANDARD] Designed as a master setting reference. Used for zeroing and calibrating bore gauges, inside micrometers, calipers, and other internal measuring instruments for quality control in manufacturing.
Show More
Top 4

35 mm ID Metric Plain Setting Ring Gauge for Bore Gages Calibration

HeeHoo
35 ID x 68 OD x 18 Thick 0.4 µm

Ratings for HeeHoo (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
HeeHoo Store - ❌ ❌ ❌

Features

Precision You Can Trust: ±0.002 mm tolerance with a mirror-like Ra ≤0.4 µm lapped bore, giving you the confidence that every bore gauge, inside micrometer, or dial indicator you set is dialed in exactly right—no guesswork, no costly rework.
Choose Your Exact Size, 1 mm to 300 mm: With 100+ metric bore options in one listing, you'll find the precise ID you need without hunting across suppliers—from tiny 1 mm bores to large 300 mm diameters, each with a matched OD and thickness for stability.
Show More
Top 5

1-100mm Inner Diameter Calibration Gauge Setting Ring Gauge, GCR15 Bearing Steel Measuring Tool for Calibrating Inside Micrometers and Bore Gauges(1 pcs) (19 mm)

Generic
YH1031

Ratings for Generic (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
YLMYYXGS - ❌ ❌ ❌

Features

[GCR15 BEARING STEEL] Constructed from GCR15 bearing steel. This material provides structural stability and wear resistance for standard machining environments.
[CALIBRATION STANDARD] Designed as a master setting reference. Used for zeroing and calibrating bore gauges, inside micrometers, calipers, and other internal measuring instruments for quality control in manufacturing.
Show More
Top 6

INSIZE 6313-1D4 Setting Ring, 1.4" Diameter

INSIZE
6313-1D4
1.0 Pounds

Ratings for INSIZE (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com - ✅ ✅ ✅
CoolPoolTables - ❌ ❌ ❌

Features

For zero setting of inside micrometres
Package Dimensions: 10.16 H x 4.572 L x 9.652 W (centimetres)
Show More
Top 7

1-100mm Inner Diameter Calibration Gauge Setting Ring Gauge, GCR15 Bearing Steel Measuring Tool for Calibrating Inside Micrometers and Bore Gauges(1 pcs) (13 mm)

Generic
YH1031

Ratings for Generic (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
YLMYYXGS - ❌ ❌ ❌

Features

[GCR15 BEARING STEEL] Constructed from GCR15 bearing steel. This material provides structural stability and wear resistance for standard machining environments.
[CALIBRATION STANDARD] Designed as a master setting reference. Used for zeroing and calibrating bore gauges, inside micrometers, calipers, and other internal measuring instruments for quality control in manufacturing.
Show More
Top 8

INSIZE 6313-1D6 Setting Ring, 1.6"Dia, Silver

INSIZE
6313-1D6

Ratings for INSIZE (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Vera Tools 5,296 ❌ ❌ ❌
Neobits_ - ❌ ❌ ❌
VirVentures 194 ❌ ❌ ❌

Features

For zero setting of inside micrometers, three points internal micrometers and bore gages
Deviation is the difference between the ordered size and the size marked on the setting ring when supplied.
Show More
Top 9

1-100mm Inner Diameter Calibration Gauge Setting Ring Gauge, GCR15 Bearing Steel Measuring Tool for Calibrating Inside Micrometers and Bore Gauges(1 pcs) (24 mm)

Generic
YH1031

Ratings for Generic (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
YLMYYXGS - ❌ ❌ ❌

Features

[GCR15 BEARING STEEL] Constructed from GCR15 bearing steel. This material provides structural stability and wear resistance for standard machining environments.
[CALIBRATION STANDARD] Designed as a master setting reference. Used for zeroing and calibrating bore gauges, inside micrometers, calipers, and other internal measuring instruments for quality control in manufacturing.
Show More
Top 10

Master Setting Ring Gauge, 0.002 mm Tolerance for Bore Gauge Calibration

WsidQokfn
WsidQokfn

Ratings for WsidQokfn (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
KFLSYS - ❌ ❌ ❌

Features

【Reference Setting】 Master setting ring gauge provides a bore-size reference; use this setting ring to preset compatible bore gauges and internal micrometers.
【0.002 mm Tolerance】 Setting ring gauge has a specified tolerance of 0.002 mm; master ring provides a reference for setting compatible internal measuring tools.
Show More
Top 11

INSIZE 6313-0D7 Setting Ring, 0.7" Diameter

INSIZE
6313-0D7
0.0 x 0.0 x 0.0 Inches
0.3 Pounds

Ratings for INSIZE (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Vera Tools 5,296 ❌ ❌ ❌
CoolPoolTables - ❌ ❌ ❌

Features

For zero setting of inside micrometers
Three points internal micrometers and bore gages
Show More
Top 12

1-25mm Inner Diameter Calibration Gauge Setting Ring Gauge 0.002mm Smooth Hole Gauge(20mm 1pc)

SHIHUANI
SHIHUANI

Ratings for SHIHUANI (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
chengmaoyouxianzerengongsi - ❌ ❌ ❌
DELONGSHANGWU - ❌ ❌ ❌
wangweiqijiandian - ❌ ❌ ❌
YiZhangYangYangYangDianZiShangWuYouXianGongSi - ❌ ❌ ❌
TuZhiNan - ❌ ❌ ❌

Features

1.This product is made of high quality steel.
2.The product has high hardness measuring surface, wear resistance and long service life.
Show More
Top 13

Master Setting Ring Gauge, 0.002 mm Tolerance for Bore Gauge Calibration

WsidQokfn
WsidQokfn

Ratings for WsidQokfn (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
KFLSYS - ❌ ❌ ❌

Features

【Reference Setting】 Master setting ring gauge provides a bore-size reference; use this setting ring to preset compatible bore gauges and internal micrometers.
【0.002 mm Tolerance】 Setting ring gauge has a specified tolerance of 0.002 mm; master ring provides a reference for setting compatible internal measuring tools.
Show More
Top 14

INSIZE 6313-1 Setting Ring, 1.0" Diameter

INSIZE
6313-1
3.15 x 3.15 x 1.18 Inches
0.0006 pounds

Ratings for INSIZE (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com - ✅ ✅ ✅
CoolPoolTables - ✅ ✅ ✅
Soldier Shipments - ✅ ✅ ✅
Vera Tools 5,296 ❌ ❌ ❌
E Com Shop - ❌ ❌ ❌
Premier Offerings 7,578 ❌ ❌ ❌

Features

Accuracy: Class XX of ASME B89. 1. 6
Made of stainless steel
Top 15

SPI 10-738-3 Setting Ring: 1" ID x 2-1/2" OD x 0.63" Thick, Accurate to 0.0001"

SPI
10-738-3
2.5 x 2.5 x 0.63 inches
0.7 pounds

Ratings for SPI (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
SELECTUM - ❌ ❌ ❌
Turtle & Hughes Inc. - ❌ ❌ ❌

Features

0.00 micron surface smoothness
Use to calibrate inside micrometers at either the high or low end of the range
Show More
Top 16

INSIZE 6313-7H32 Setting Ring, 7/32 Diameter

INSIZE
6313-7H32
0.0 x 0.0 x 0.0 Inches
0.14 Pounds

Ratings for INSIZE (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
CoolPoolTables - ❌ ❌ ❌

Features

For zero setting of inside micrometers
Three points internal micrometers and bore gages
Show More
Top 17

Master Setting Ring Gauge, 0.002 mm Tolerance for Bore Gauge Calibration

WsidQokfn
WsidQokfn

Ratings for WsidQokfn (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
KFLSYS - ❌ ❌ ❌

Features

【Reference Setting】 Master setting ring gauge provides a bore-size reference; use this setting ring to preset compatible bore gauges and internal micrometers.
【0.002 mm Tolerance】 Setting ring gauge has a specified tolerance of 0.002 mm; master ring provides a reference for setting compatible internal measuring tools.
Show More
Top 18

Master Setting Ring Gauge, Precision Calibration Smooth Hole Gauge for Bore Micrometer Internal Diameter Inspection, 0.002mm Tolerance, Wear-Resistant Measuring Tool for Machine Shop(47mm)

WsidQokfn
WsidQokfn

Ratings for WsidQokfn (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
KFLSYS - ❌ ❌ ❌

Features

1.This product is made of high quality steel.
2.The product has high hardness measuring surface, wear resistance and long service life.
Show More
Top 19

INSIZE 6313-0D6 Setting Ring, 0.6" Diameter

INSIZE
6313-0D6
0.01 pounds

Ratings for INSIZE (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
CoolPoolTables - ❌ ❌ ❌

Features

Product Type :Precision Measuring
Package Dimensions :2.64 " L X2.64 " W X1.02 " H
Show More
Top 20

1-25mm Inner Diameter Calibration Gauge Setting Ring Gauge 0.002mm Smooth Hole Gauge(12mm 1pc)

SHIHUANI
SHIHUANI

Ratings for SHIHUANI (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Dansy Electronic Technology - ❌ ❌ ❌
Yaoyue Store - ❌ ❌ ❌
yiyuandexiaodian - ❌ ❌ ❌

Features

1.This product is made of high quality steel.
2.The product has high hardness measuring surface, wear resistance and long service life.
Show More
Top 21

SPI 10-719-3 Setting Ring: 1/2" ID x 1-1/2" OD x 0.393" Thick, Accurate to 0.0001"

SPI
10-719-3
0.5 Pounds

Ratings for SPI (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
MSC Industrial Direct - ❌ ❌ ❌

Features

0.00 micron surface smoothness
Use to calibrate inside micrometers at either the high or low end of the range
Show More
Top 22

Mitutoyo 177-290 Setting Ring, 40mm Size, 15mm Width, 71mm Outside Diameter, +/-1.5Micrometer Accuracy

Mitutoyo
177-290
3.3 x 3.2 x 0.9 inches
0.75 Pounds

Ratings for Mitutoyo (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
ECbase (Import Duty Free) - ✅ ✅ ✅
GRACES INC. - ✅ ✅ ✅
tokyo lucky store - ✅ ✅ ✅
Hana Hana Shop - ❌ ❌ ❌
CRESCENT ELECTRIC SUPPLY COMPANY - ❌ ❌ ❌

Features

It is used as an accessory for inside micrometers, hottest and dial bore gauge
Used for quick zero adjustment of dial bore gauges, hottest, and inside micrometers
Show More
Top 23

INSIZE 6313-2D5 Setting Ring, 2.5" Diameter

INSIZE
6313-2D5

Ratings for INSIZE (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com - ✅ ✅ ✅
Vera Tools 5,296 ❌ ❌ ❌

Features

For zero setting of inside micrometers
Three points internal micrometers and bore gages
Show More
Top 24

1-25mm Inner Diameter Calibration Gauge Setting Ring Gauge 0.002mm Smooth Hole Gauge(14mm 1pc)

SHIHUANI
SHIHUANI

Ratings for SHIHUANI (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
XUXUANVN - ❌ ❌ ❌
YiZhangYangYangYangDianZiShangWuYouXianGongSi - ❌ ❌ ❌
qingboQIN - ❌ ❌ ❌

Features

1.This product is made of high quality steel.
2.The product has high hardness measuring surface, wear resistance and long service life.
Show More
Top 25

1-25mm Inner Diameter Calibration Gauge Setting Ring Gauge 0.002mm Smooth Hole Gauge(10mm 1pc)

SHIHUANI
SHIHUANI

Ratings for SHIHUANI (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
yuxingmaoyitong - ❌ ❌ ❌
YiZhangYangYangYangDianZiShangWuYouXianGongSi - ❌ ❌ ❌
LongYanShiXinLuoQuChenYuHongDaShangMaoYouXianGongSi - ❌ ❌ ❌

Features

1.This product is made of high quality steel.
2.The product has high hardness measuring surface, wear resistance and long service life.
Show More
Top 26

SPI 10-748-1 Setting Ring: 2" ID x 4-7/16" OD x 0.787" Thick, Accurate to 0.0001"

SPI
10-748-1
4.44 x 4.44 x 0.79 inches
1.7 pounds

Ratings for SPI (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Turtle & Hughes Inc. - ❌ ❌ ❌

Features

2-inch Inside diameter x 4-7/16 inch outside diameter x 0.787" thick; 0.0001" accuracy
0.00 micron surface smoothness
Show More
Top 27

Mitutoyo 177-319 Setting Ring, 3.5" Size, 0.98" Width, 5.51" Outside Diameter, +/-0.00006" Accuracy

Mitutoyo
177-319
7.0 x 7.0 x 2.0 Inches

Ratings for Mitutoyo (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Ideal Precision Instrument Service, Inc. - ✅ ✅ ✅
Amazon.com - ✅ ✅ ✅

Features

Actual inside diameter is marked on each ring
It is used as an accessory for inside micrometers, hottest and dial bore gauge
Show More
Top 28

INSIZE 6313-0D8 Setting Ring, 0.8" Diameter

INSIZE
6313-0D8

Ratings for INSIZE (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com - ✅ ✅ ✅
Vera Tools 5,296 ❌ ❌ ❌

Features

For zero setting of inside micrometers
Three points internal micrometers and bore gages
Show More
Top 29

1-25mm Inner Diameter Calibration Gauge Setting Ring Gauge 0.002mm Smooth Hole Gauge(25mm 1pc)

SHIHUANI
SHIHUANI

Ratings for SHIHUANI (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
FlowCraft Fittings - ❌ ❌ ❌
wangweiqijiandian - ❌ ❌ ❌
xuebo'shop - ❌ ❌ ❌
yiyuandexiaodian - ❌ ❌ ❌
YangXinXianYaoJiShangMaoYouXianGongSi - ❌ ❌ ❌

Features

1.This product is made of high quality steel.
2.The product has high hardness measuring surface, wear resistance and long service life.
Show More
Top 30

1PC Φ2mm-80mm Smooth Ring Gauge Inner Diameter Calibration Gauge Plain Ring Gage Smooth Hole Gage Measuring Tools(50mm)

SHIHUANI
SHIHUANI

Ratings for SHIHUANI (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
jierongys - ❌ ❌ ❌
huojugs - ❌ ❌ ❌

Features

1.This product is made of high quality steel.
2.The product has high hardness measuring surface, wear resistance and long service life.
Show More

Top 10 Calibration Setting Rings - Verified to Buy (October 2026)

Top 7 Calibration Setting Rings Brands on Amazon

Here is the list of top-rated brands that were evaluated by CherryPicks.

  • WsidQokfn
  • Generic
  • HeeHoo
  • INSIZE
  • SHIHUANI
  • SPI
  • Mitutoyo

Top 10 Calibration Setting Rings Sellers: CPR Seller Rank List

CPR sellers rank is based on CherryPicks-AI bestselling ranking system that helps us analyze each seller's sales trends. The List of top seller ranks is our in-house data, essential for our product ranking to help you make the right shopping choice.

Rank Name Yearly Feedbacks Avg. Ratings
🥇 VirVentures 178,903 4.7
🥈 Vera Tools 12,449 4.8
🥉 Premier Offerings 8,971 4.9
4 CoolPoolTables 5,498 4.8
5 ECbase (Import Duty Free) 2,323 4.9
6 CRESCENT ELECTRIC SUPPLY COMPANY 1,791 4.9
7 Soldier Shipments 1,743 4.2
8 Neobits_ 849 3.7
9 Turtle & Hughes Inc. 753 3.9
10 Amazon.com 386 4.7
View or download top Calibration Setting Rings seller & rating report
VirVentures [178903] Vera Tools [12449] Premier Offerings [8971] CoolPoolTables [5498] ECbase (Import Duty Free) [2323] CRESCENT ELECTRIC SUPPLY COMPANY [1791] Soldier Shipments [1743] Neobits_ [849] Turtle & Hughes Inc. [753] Amazon.com [386] VirVentures 84% Vera Tools 6% Premier Offerings 4% CoolPoolTables 3% ECbase (Import Duty Free) 1% CRESCENT ELECTRIC SUPPLY COMPANY 1% Soldier Shipments 1% Neobits_ 0% Turtle & Hughes Inc. 0% Amazon.com 0%

[Get] Calibration Setting Rings Deals (✅Exclusively for Prime)

What does "Amazon Fulfilled" Mean?

Amazon Fulfilled refers to products handled by Amazon's logistics, which indicates that the product is stored, packed, and shipped by Amazon from one of its fulfillment centers.

When you order a product that is "Amazon Fulfilled," Amazon takes care of the storage, packing, shipping, and customer service for that product. This often ensures quicker delivery and better customer service compared to products that are not fulfilled by Amazon. It also means that the product is eligible for Amazon's return policy.

What does "Prime" Mean?

"Prime" refers to Amazon Prime Member (Join Amazon Prime Now), which indicates eligibility for Prime benefits. When you see "Prime" next to a product on Amazon, This generally means that if you are  an Amazon Prime member, you can get free two-day shipping on that product, and sometimes even same-day or one-day shipping depending on your location.

Prime members also have access to other benefits, including 2-Day Shipping, Exclusive Member Deals, Prime Video, Buy With Prime, Amazon Music, Prime Gaming, and more.

Shop Prime Calibration Setting Rings Deals

What does "Free Shipping" Mean?

"Free Shipping" means that you will not be charged additional fees for the shipping of that product. However, unlike "Prime," which usually guarantees fast two-day shipping, "Free Shipping" doesn't necessarily mean fast shipping.

Sometimes there might be a minimum purchase requirement to qualify for free shipping if you are not a Prime member. For Prime members, the "Free Shipping" usually refers to the free two-day shipping that is one of the benefits of the Prime membership.


Why Should You Trust Us?

Now hundreds and thousands of Test, Measure & Inspect supplies are available on Amazon, Picking the right one is not easy, and that may take a lot of your time, Right? and What is the best Calibration Setting Rings to buy for new October 2026?

CherryPicks’s Methodology for Evaluating Calibration Setting Rings

We developed the CherryRatings-AI system to identify and score reviews and the CherryPicks-AI ranking system that uses TensorFlow framework to generate the best list, It will help us evaluate Test, Measure & Inspect items that sell on Amazon. The score of items is based on over ten parameters such as analyzing customer review content, product reviewing rating statistics, brand reputation evaluation, comparing product price with features, etc, You can visit How We Rank to learn more in detail.

We collected and analyzed 306 of Calibration Setting Rings reviews based on our selection criteria. It helped us shortlist the top qualified and rated Calibration Setting Rings for Test, Measure & Inspect, We found that most customers choose Calibration Setting Rings with an average price of $99.76, and the top brands are Generic, Mitutoyo, SPI And INSIZE. 

Then our expert-level editors reviewed all those quality items and selected the top 30 Calibration Setting Rings for you, We have researched hundreds of sellers and picked the top sellers for Test, Measure & Inspect, including VirVentures, Vera Tools, Premier Offerings, CoolPoolTables, ECbase (Import Duty Free), CRESCENT ELECTRIC SUPPLY COMPANY, Soldier Shipments, Neobits_, Turtle & Hughes Inc., Amazon.com, GRACES INC. And Ideal Precision Instrument Service, Inc.. The Master Setting Ring Gauge, Precision Calibratio... are available for purchase right now, and The seller of #1 rank product has received honest feedback from 0 consumers with an average rating of 0.0.

We've helped a lot of satisfied users get the right Industrial & Scientific product based on their needs, and save lots of time for them to pick Calibration Setting Rings to buy.


Written By Thomas Joseph

Thomas Joseph has over 7 years of working experience with a reputation science laboratory. He is a father, a writer, and a pet lover. He would be sharing his expert knowledge on Industrial and scientific equipment to help us make the right purchase.