ball retainers(ball Cages, ball bearing)Material:Aluminum,POM, BrassDANNY, HASCO,MISUMI,D-M-EWithout MOQSample is freeReferance :MISUMI, HASCO,FUTEBA,DME,DANNY standard.1>Plastic mould components2>Hardware mould components3>Stamping (Die) mould components4> Core pin or Insert pin...