Specification Brand : HFBTE BulletPoint1 : ◆(1)Material:1018 Steel. BulletPoint2 : ◆(2)Hole diameter: 3mm BulletPoint3 : ◆(3)Standard: ISO2400-2012 with Arc groove BulletPoint4 : ◆(4)For calibrating ultrasonic flaw detection equipment in both laboratory and on-site conditions. BulletPoint5 : ◆(5)If you need to buy other Ultrasonic Calibration Blocks,please let me know,i will help you to solve it. Color : Silver IncludedComponents : ONLY A BLOCK ItemName : HFBTE Ultrasonic Flaw Detector Calibration Block NDT UT Testing for Ultrasonic Flaw Detection Equipment with 3mm Hole Diameter 1018 Carbon Steel According to ISO2400-2012 ItemPackageDimensions_Height : 5 centimeters ItemPackageDimensions_Length : 10 centimeters ItemPackageDimensions_Width : 5 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : flaw-detection-tools Manufacturer : HFBTE Material : 1018 Steel MeasurementAccuracy : precise ModelName : Gearwell19thcipan2 ModelNumber : 2025010222dara NumberOfItems : 1 PartNumber : 2025010222dara ProductDescription : ◆Please note that the prices is only one pieces Ultrasonic Calibration Block◆