... Grade: G10-G1000 Standard:ISO 9001:2008/SGS test report/ROHS report Stainless steel ball Name: Stainless steel ballsMaterial: ... AISI304,316,420C,440CSize: 0.8mm-150mmGrade: G10-G1000Hardness: AISI304 ... OUR MAIN PRODUCTS:Stainless steel ball:AISI302,304,316,420,4440CBearing steel balls:AISIE52100Carbon steel balls:AISI1010,1015,1045 ...