... caster with brake wheel material:PP, PU, PVC Dia.:40mm,50mm,63mm brake by customized light-duty electrophoresis top plate ... of pressed steel, electrophoresis rim, double ballrace swivel head2.Dia.:40mm,50mm,63mm3.Matching with different fittings such as swivel fixed, ... brake plate, threaded stem4.Available in PP, PU or PVC wheels.5 ...