Threaded Plug Gage, Dimension Type Metric, Gauge Type Go (Plus), Included Handle Taperlock 4, Thread Class 6H, Thread Size M22.50, Tolerance Class X, Gauge Finish Chrome Plated, Gauge Length - Go Member 25.4 mm, Gauge Material Tool Steel, Handle Color Yellow, Hardness RC 70/72, Included Certification Certificate of Accuracy, Long Form Calibration Certificate Yes, Pitch Diameter - Go Member 20.376 mm, Standards ISO 17025.