... precision, high concentricity 4.No bubbles 5.Smooth surface DescriptionRubber BearingBrandDuraproMaterialNature rubber, NBR, PU, Silicone...DimensionPer drawing ... to 80°CHub MaterialAluminum, Steel, Sintered Bronze, Brass, Bearing, Many PlasticsBearing ChoicesBall, Needle, Sintered Bronze, PlasticWarranty6 months ... match our customers' needs 6000 series rubber bearing, rubber coated bearing