Ball retainers(Bearing, ball cages) Material: POM, BRASS, ALUMINUM. HASCO,DANNY,MISUMI,D-M-E, Without MIQ ... is free Ball retainers(Bearing, ball cages)Material: POM, BRASS, ALUMINUM.New Era Precision Mold Accessories Co.,LTD produce:1>Plastic ... years , mainly professional manufacture the plastic mould components,die(casting mould components),hardware mould components,according to MISUMI,FUTABA,HASCO ...