The Jabsco 6303-0007-P Polyurethane Impeller with O-Ring and Lubrication is a replacement impeller that's compatible with some wakeboard and ski boat ballast pumps. This water pump impeller is also compatible with Jabsco 18220 Series specially designed replacement impellers for stern wheel and water ski boat ballast pumps. It's also compatible with Johnson Ultra Ballast Pump and other related pumps. The 6303-0007-P Impeller is made of green polyurethane and suitable for water transfer applications. Polyurethane has better wear resistance, corrosion resistance, and other characteristics, which will help to effectively transfer water during the operation of the pump to ensure the pump's normal work performance. The impeller is a six-bladed structure with a diameter of 2", a width of 7/8", and a shaft diameter of 5/16" and is designed to help adapt to the corresponding pumps to generate the appropriate water flow power to meet the pump's working requirements. The single flat D 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. SpecificationsModel Number: 6303-0007-PMaterial: Green PolyurethaneShaft Diameter: 5/16"Impeller Depth: 7/8"Number of Blades: 6Impeller Diameter: 2"Insert Material: Plastic Made of green polyurethane & suitable for water transfer applications Six-bladed structure adapts to the corresponding pumps for appropriate water flow Single flat D drive mode helps make impeller & shaft stable & efficient | Jabsco 6303-0007-P Impeller Kit with O-Ring and Lubrication in Green