Best quality with good service 1.name : 2013 top quality stainless steel balls2.grade : G100,G200,G500,G1000,3.size: 3/32, 1/8, 3/16, 1/4, 5/16, 3/8, 1/2, 14.application:mainly used to for simply bearing, castor wheel,bicycle,aviation and so on5.standard: ISO9001:2008 2013 top high quality stainless steel balls