... ball retainers(ball cages, ball bearing) Material:Aluminum,POM, Brass DANNY, HASCO,MISUMI,D-M-E Without MOQ Sample is free ball retainers(ball cages, ball ... bearing)Material:Aluminum,POM, BrassStandard ball and non-standard follow ... Die,guide post sets(guide bushes,guide pillar, ball retainer,).Holder guide post sets.Custom-made parts:Gate ...