Supply of One Set Of Following Hardness Testing Block With Nabl Calibration Certifi Cate 1. 01 No. Rockwell Hardness Testing Block Of Hardness 50-60 Hrc 2. 01 No.Rockwel L Hardness Testing Block Of Hardness 30-40 Hrc 3. 01 No. Rockwell Hardness Testing Bl Ock Of Hardness 50-60 Hrb 4. 01 No. Vicker Hardness Testing Block Of Hardness 750 Hv O N Hv1 Scale Warranty Period: 30 Months After The Date Of Delivery