Product Highlights Mitutoyo 611863-521 .14mm Rectangular Steel Gage Block, ASME Steel blocks are made from high carbon high chrome steel to reduce wear and corrosion Precision ground and lapped to provide excellent wringing characteristics Thermally stabilized to reduce changes in gage block length over time Laser-etched with individual serial number for traceability Supplied with a certificate of inspection to ensure each block has been inspected