Jabsco Impeller Kit - 9 Blade - Nitrile - 3-3/4" Diameter x 3-1/2" W, 1" Shaft DiameterThe Jabsco Impeller Kit 9 Blade, nitrile, 3 3 4" diameter x 3 1 2" width with a 1" shaft provides reliable performance for bronze flexible impeller pumps used in marine engine cooling, bilge, transfer, and generalpurpose applications. Blade Count: 9 Material: Nitrile for lasting flexibility and wear resistance Diameter: 3 3 4" Width: 3 1 2" Shaft Diameter: 1" Drive Type: Spline Drive Applications: Fits most bronze flexible impeller engine cooling,