Ball retainer(Ball cages, ball bearing cages) Material: Brass,Aluminum, POM Danly, Hasco, MISUMI, PUNCH, DIN Without MOQ Ball retainer(Ball cages, ball bearing cages)Material: Brass,Aluminum, POMDanly, Hasco, ... MISUMI, PUNCH, DINWithout MOQBall Retainer Bearing with the rolling ball principle, with ...