99.5% alumina ceramic piston pump Fine ceramic piston Alumina ceramic shaft pump High purity alumina 99.5% al203 Features:1) A ... , plate, disc, wafer, ring, seal, bearing, valves, pump plunger, beam, roller, shaft, screw, washer, sleeve, hunger, spacer, holder, carrier, insulator, scissors, knife ... 01Planeness0.005Roughness 0.05Fit clearance0.005 99 alumina ceramic piston pump &alumina ceramic part