tender for one set of following hardness blocks with nabl calibration certificate 1.hrc hardness test blockrange 35-40hrc 2. hrb hardness test block of 40 hrb 3. hrb hardness test block of 60 hrb 4. hv hardnesstest block of 400hv on hv1 scale 5.hbw hardness test block of 150 hbw 10/3000 .
