Jacuzzi Magnun 1 Hp Impeller 1.5 Hp Uprate 4-3/4In Dia. Features -Uprate Jacuzzi Magnun Impeller-Also fits magnum plus, magnum force and magnum force 3 pumps- Specifications - Diameter: 4.75 dia.- Horsepower: 1 and 1.5 HPJacuzzi Magnun 1 Hp Impeller 1.5 Hp Uprate 4-3/4In Dia. Features -Pump impeller closed face impeller made for the magnum pool pump-Also fits magnum plus, magnum force and magnum force 3 pumps- Specification - Horse power: 1