Class ZZ Go Pin Gauge Material Steel Finish Uncoated Diameter 0.24mm Diameter Increment 0.01 mm Diameter Range 0.20mm to 1.29mm Diameter Sub-Range 0.20mm to 0.49mm Dimension Type Metric Gauge Type Go (Plus) Included Certification Certificate of Accuracy with NIST Traceability Surface Finish 10 Microinch or Better Tolerance 0.005 mm Tolerance Class ZZ Hardness RC 60/65 Long Form Calibration Certificate No Overall Length 2 in Standards ISO 17025