99% alumina ceramic part -A variety of specifications available -Good insulation performance -High wear ... , wafer, ring, seal, bearing, valves, pump plunger, beam, roller, shaft, screw, washer, sleeve, hunger, spacer, holder, carrier, insulator, scissors, knife, slitter ... .005Parallelism0.01Planeness0.005Roughness 0.05Fit clearance0.005 99% alumina ceramic part& ceramic shaft