6303-0007-P Polyurethane Impeller with O-Ring Kit & Lubrication Replacement Compatible with Some Wakeboard & Ski Boat Ballast Pumps This impeller kit includes O-rings, glycerin lubrication kit parts.3 pieces total 6303-0007-P Water Pump Impeller Replacement Compatible with Jabsco 18220 Series, specially designed replacement impellers for sternwheel and water ski boat ballast pumps, also compatible with Johnson Ultra Ballast Pump and other related pumps 6303-0007-P polyurethane impeller is made of green polyurethane (Urethane), this material is suitable for water transfer applications, has better wear resistance and corrosion resistance and other characteristics, which will help to effectively transfer water during the operation of the pump, to ensure that the pump's normal work performance The impeller is a six-bladed structure with a diameter of 2 inches (50.8mm), a width of 7/8 inches (22.3mm), and a shaft diameter of 5/16 inches (7.9mm), which is designed to help adapt to the corresponding pumps to generate the appropriate water flow power to meet the pump's working requirements Adopting single flat D drive mode, this drive mode helps the impeller and motor shaft to cooperate, which makes the power transmission more stable and efficient, and ensures the impeller's normal operation in the water pump 4PC 6303-0007-P Polyurethane Impeller with O-Ring Kit & Lubrication Replacement Fits Some Wakeboard & Ski Boat Ballast Pumps