With glazed surface polished zirconia plunger -Wear resistance -Mirror surface -High density -High hardness With glazed surface polished zirconia plunger Features:1.Use temperatures up ... drawings, samples and performance requirement. Zirconia ceramic are used in shaft , plunger, sealing structure, auto mobile Industrial ... 0.05Fit clearance0.005 With glazed surface polished zirconia plunger