... 3.mechanical seals good 4.anti-corros alumina ceramic shafts for water pumpOD10*80.5,OD10*99,OD14*154,OD14*174Our company ... ceramic plunger pump, ceramic rod, ceramic shaft, ceramic piston, ceramic water valve sheet, ceramic pipe sleeve, ceramic loom plunger, ceramic seal ... .005Parallelism0.01Planeness0.005Roughness 0.05Fit clearance0.005 alumina ceramic shafts for 20/30/90W water pump