Specification Brand : Fafeicy BulletPoint1 : STEEL MATERIAL: Made of premium steel after heat treatment, the gauge block has the characteristics of high accuracy, low roughness, good bonding force, and stable size. BulletPoint2 : HIGH ACCURACY: Gauge blocks have a high accuracy, low roughness, and good grinding force; Other accuracies used for calibrating instruments. BulletPoint3 : MAIN FUNCTION: Gauge block is the highest accuracy benchmark for converting broadcast wavelengths into physical length sizes. And by comparing and measuring, transfer the dimensional annotation techniques to accuracy gauges, measuring tools, and workpieces. BulletPoint4 : CALIBRATION MEASUREMENT: Thickness gauge block group is ground and polished to have a very low micro finish; They have an accuracy of ± 0.00005in. BulletPoint5 : 32PCS: There are 32 pieces gauge blocks in the box and are well identified for convenient using and storing, choose and use at will! Color : Kp30 ExternallyAssignedProductIdentifier : 8180726752475 ItemName : Gauge Block, Gauge Block Kit Steel 32Pcs with Case for Equipment ItemPackageDimensions_Height : 5 centimeters ItemPackageDimensions_Length : 21 centimeters ItemPackageDimensions_Width : 12 centimeters ItemTypeKeyword : gage-blocks Manufacturer : Fafeicy ModelNumber : Fafeicyye0ftkvq6r PartNumber : Fafeicyye0ftkvq6r ProductDescription : 1. MAIN FUNCTION: Gauge block is the highest accuracy benchmark for converting broadcast wavelengths into physical length sizes. And by comparing and measuring, transfer the dimensional annotation techniques to accuracy gauges, measuring tools, and workpieces. 2. STEEL MATERIAL: Made of premium steel after heat treatment, the gauge block has the characteristics of high accuracy, low roughness, good bonding force, and stable size. 3. CALIBRATION MEASUREMENT: Thickness gauge block group is ground and polished to have a very low micro finish; They have an accuracy of ± 0.00005in. 4. HIGH ACCURACY: Gauge blocks have a high accuracy, low roughness, and good grinding force; Other accuracies used for calibrating instruments. 5. 32PCS: There are 32 pieces gauge blocks in the box and are well identified for convenient using and storing, choose and use at will!