Master Setting Gauge For Dial Snap Gauge. Size (O.D.) 157.000Mm (+/- 0.002). Thickness-40M M. Material: Cold Work Tool Steel To Is:3748/90, Hardness-50/55 Hrc. Supply With Calibration Certificate Issu Ed From Any Nabl. Packed In A Suitable Storing Wooden Box. (Warranty Period: Upto 30 Months From The Da Te Of Supply) [ Warranty Period: 30 Months After The Date Of Delivery ] ]