Steel Shot Peening: Environmentally friendly long durability Certificate:ISO Steel Shot Peening:Normal:40-50HRC (377-509HV)Special:52-56HRC (543-620HV)Special:56-60HRC (620-713HV)Steel Shot PeeningSize: S930,S780 S660 S550 S460 S390 S330 S280 S230 S170 S110 S70Diameter:2.5mm,2.0mm,1.7mm,1.4mm,1.2mm,1.0mm,0.7mm,0.4mm,0.3mm,0.2mmProduct Details ProductsSteel ShotChemical CompositionC0.70-1.20%Mn0. ...