... steel (Aisi440,440c,304) ISO9001,IQNET certificate Deep groove ball bearings:604 ...series 604ZZ...series 604 2RS...series ... inch) 30200, 30300, 32200, 32300, 32000x, 313000,33000,33200,333...LM, HM seriesStainless steel bearings:single & double rows ball bearings,taper roller bearings,thrust ball ... kinds of huge size bearingsNon-standard bearingsSteel ball ,rollers, ceramic ball,POM ball, glass ball