Tooth Spacing ('K' Value) Checking "No Go" Gauge For Bull Gear -72 Teeth For Wap7/Wag9 Loc Os. Size "No Go": 260.312 Mm, Ref: Rdso Drg. No. Skdp-3474, Alt. 4. Material: Tool Steel Is: 3748/90, Har Dness 40/45 Hrc. Calibration Certificate Traceable To Nabl To Accompany With Supplies. ]