Alumina ceramics bushing&ceramic structure part Industry ceramic Wear resistance High hardness Used ... , beam, roller, shaft, screw, washer, sleeve, hunger, spacer, holder, carrier, insulator, scissors, knife, slitter, tweezers, tools, fixture, clamp, chuck, nozzle, guide ... 0.005Parallelism0.01Planeness0.005Roughness 0.05Fit clearance0.005 Alumina ceramics bushing&ceramic structure part