1.good wear resistance 2.Good elasticity 3.High precision, high concentricity 4.No bubbles 5.Smooth surface ModelPU RollerBrandKamidMaterialPolyester,Polyether, Urethane imported from ... -40°C to 80°CHub MaterialAluminum, Steel, Sintered Bronze, Brass, Bearing, Many PlasticsBearing ChoicesBall, Needle, Sintered Bronze, PlasticMOQ10pcsPriceBased on dimension & qty wear-resistant ...