... concentricity 4.No bubbles 5.Smooth surface DescriptionRubber RollerBrandKamidMaterialNature rubber, NBR, PU, Silicone...DimensionPer drawing or requestColormore than ... or per requestHardnessShore 5A~ 95ATemperatureup to 300°CHub MaterialAluminum, Steel, Sintered Bronze, Brass, Bearing, Many PlasticsBearing ChoicesBall, Needle ... ' needs industrial Polyurethane coated ginding roller with metal core