JIS CODE ball retainer(Ball cages, ball bearing cages) Material: Brass,Aluminum, POM Danly, Hasco, MISUMI, JIS CODE ball retainer (Ball cages, ball bearing cages)Material: Brass,Aluminum, POMDanly, Hasco, MISUMI, PUNCH, DINWithout MOQBall Retainer Bearing with the rolling ball principle, with a copper base, aluminum or resin to maintain the planes, according to a certain angle and density ...