SouthMarine 17937-0001 09-1028B 18200 Flexible Impeller for Jabsco Johnson Sherwood Inboard Engines Number of Blades: 10 Height: 50mm External Impeller Overall Diameter: 65mm Internal Shaft Insert Diameter: 16mm Brass Hub A External Impeller Overall Diameter: 65mm B Height: 50mm C Internal Shaft Insert Diameter: 16mm Brass Hub Number of Blades: 10