81 Pcs Steel Gauge Block Set, Grade B, P900-S581. 81 pc Grade B Steel Gage Block Set with MFG'S certificate. Manufactured under carefully controlled conditions allowing for the highest degrees of accuracy when used at a temperature of 68 degrees F. All gage block sets are assigned serial numbers and accompanied with a certificate of inspection listing the deviation for each block. Each gage block set meets or exceeds federal specification ASME B89.1.9-2002.Hardened to HRC 64 / All gage block sets are made to special standard to resist corrosion and defacement. Manufactured under carefully controlled conditions allowing for the highest degree of accuracy when used at a temperature of 68 degrees F (20 degree C). If you receive an item and it doesn't work properly or you don't like it because of any reason at all. Please wait for the result of cancellation. The order will be processed and completed by automatic warehouse system within 5 minutes. Sending direct message to cancel the order is not allowed for every case. This item is in the category "Business & Industrial\CNC, Metalworking & Manufacturing\Metalworking Inspection & Measurement\Gage Blocks & Spacers". The seller is "ongsang_0" and is located in this country: US. This item can be shipped to United States.