Cardone 58-320 Remanufactured Domestic Water Pump Units feature new, unitized ceramic seal assemblies. Unitized seals are made as one piece, which minimizes premature seal wear. Ball/Ball or Ball/Roller bearings are used as specified by O.E. for like new performance. Impellers are electronically gauged to ensure a proper press fit Applications with high off-set loads are upgraded to Ball/Roller bearings to ensure long bearing life. Every unit is 100% leak tested and hub-pulled to ensure quality and reliability.