Rectangular Gauge Block, Long Form Calibration Certificate No, Material Steel, Application Grade Inspection, Dimension Type Inch, Grade ASME 0, Nominal Size 0.05 in, Shape Rectangular, Tolerance 4 microinch, With Hole No, Face Length 1 3/16 in, Face Width 23/64 in, Included Certification Certificate of Inspection, Includes Certification, Standards ASME This gage block can be used to help calibrate micrometers and indicators.