1.Material:302/304/316L/321/420/440c /430 2.Size:0.8 - ... China ( mainland)ISO 9001:2000 ISO 9001:2008 SGS About 302 stainless steel ball Product nameAISI302 / SUSU302 / 1Cr18Ni9 / X12CrNi188 / 1.4300Size ... -treatment, Grinding, Lapping1, Lapping2, Inspection, Packing. polished and durable SUS 302 stainless steel ball ( SGS approved)