MITUTOYO 611856-516 516 INDIVIDUAL METRIC GAGE BLOCK, RECTANGULAR SHAPE, 22.8 MM L, STEEL Precision gage blocks are the primary standards vital to dimensional quality control in the manufacture of parts Mitutoyo offers a complete selection of gage blocks available in a choice of rectangular or square, metric or inch and steel or CERA (ceramic) types If using only one length repeatedly, it is good practice to purchase discrete gage blocks Each gage block is supplied with a certificate of inspection Each grade K gage block of ASME standard is specially supplied with a certificate of calibration, which certificates that the gage block was manufactured via interferometry Provided with calibration certificate and inspection certificate Gage blocks of this accuracy are intended for use within a temperature-controlled inspection room or calibration laboratory They should be used as masters with certificates against other gage blocks which are calibrated by comparison