99% alumina ceramic part -A variety of specifications available -Good insulation performance - ... , valves, pump plunger, beam, roller, shaft, screw, washer, sleeve, hunger, spacer, holder, carrier, insulator, scissors, knife, slitter, tweezers, tools, fixture, clamp ... .005Straightness 0.005Parallelism0.01Planeness0.005Roughness 0.05Fit clearance0.005 99% alumina ceramic part& ceramic shaft