... Standard ISO9001:2000 2. High precision 3.good quality with competitive price StandardAISI, GB, JISGrade304,316,316L,420, ... 440.,440C..Diameter1.0-50.8mmApplicationwidely applies in the ... -1000440C and General stainless steel widely applies in the ramming bearing,the valve,the seal,bicycle ... .60 Stainless steel ball at good price