Size: 12.7mm-120mm
Surface hardness: hrc58-66
Chemical elements: c: 1.8-3.3; si: 0.3-1.2; mn: 0.3-1.0; s & p: 0.1max; cr: 10-30( details can be adjusted by users demand).
Id from 12.7mm to 130mm high chrome grinding media
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