MITUTOYO 611857-531 516 INDIVIDUAL METRIC GAGE BLOCK, RECTANGULAR SHAPE, 41.3 MM L, STEEL 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 Provided with inspection certificate This grade is used within an inspection area to verify the accuracy of plug and snap gages, as well as for setting electronic measuring devices