Tenders for Supply of Lhb Cbc Coupler Gauge, Set Of Gauges For H Type Cbc Coupler For 3- Phase Locos. Set Consists Of 07 Items As Per Annexure Enclosed. Material: Tool Steel, Hardness: 45/55 Hrc. Note: 1 Item To Be Supplied Along With Calibration Certificate From Govt. Approved Test Lab. 2 First Calibration Valid For Period Of 2 Years. Make: Ganapathy / Jyoti / Paragon / Prasad / Lakshmi.