... , G200, G500.G1000,G2000 material : AISI1020 Low carbon steel ball Material ASTM/AISI 1020Feature:High hardness with a soft ... loads and allow rotating parts, for example: castors, conveyors, roller skates, drawer slides, seat slides, bicycles, etc.CertificationISO 9001: ... high quality.3.Products range : carbon steel ball,stainless steel ball,chrome steel ball, gringding steel ball and so on,size : from ...