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