Black Oxide-Coated Pin Gauge Set Material Tool Steel Finish Black Oxide Diameter Increment 0.001 in Diameter Range 0.0610 in to 0.2500 in Gauge Type No-Go (Minus) Number of Gauges 190 Overall Length 2 in Surface Finish Uncoated Tolerance 0.0002 in Tolerance Class ZZ Hardness RC 60/65 Included Certification Certificate of Accuracy Long Form Calibration Certificate No Standards ISO 17025 2005 Dimension Type Inch