Class ZZ Go Pin Gauge, Material Steel, Finish Black Oxide, Diameter 0.7690 in, Diameter Increment 0.0005 in, Diameter Range 0.7510 in to 0.8325 in, Diameter Sub-Range 0.7510 in to 0.7750 in, Dimension Type Inch, Gauge Type Go (Plus), Included Certification Certificate of Accuracy with NIST Traceability, Surface Finish 10 Microinch or Better, Tolerance 0.00020 in, Tolerance Class ZZ, Hardness RC 60/65, Long Form Calibration Certificate No, Overall Length 2 in, Standards ISO 17025