Procurement of Tyre defect gauges for BG coaches of size 22mm as per RDSO specification plate 38, rule no. 2. 8. 4 of IRCA, made of 4mm thick hard alloy steel plate. Note ( 1 ) Gauge made by tool ( Steel hardness ) to be 45/ 55 HRC, ( 2 ) Calibration certificate to be supplied along with material for every gauges separately, ( 3 ) Material to be supplied in individual wooden storing box with handle for carrying.