... "/3"/4"/5"/6"TPR / PP / PU / Rubber / NylonZinc plated, Chrome platedBall bearing , double ball bearing , bushing , delrin bearing , plain bearingFeatures:1 ... : High quality cold-rolled steel plate.7. Applied to furniture as chair, sofa; Medical appliance equipment; Tool appliance cart as hotel handcart ... ,pleae do not hesitate to contact with us. . Top plate rubber ball swivel caster wheel