... Silicone...DimensionPer drawing or requestColormore than 30 colors or per requestHardnessShore 5A~ 95ATemperatureup to 300°CHub MaterialAluminum, Steel, Sintered Bronze, ... wear resistance2. high precision, can be within 2ddm3. good depth of parallelism4. no bubbles, smooth surfaceUsageAll kinds of machineTechnologycasting by ... wear resistant PU wheel with axle shaft, High quality (Many hardness)