Sherwood® 12937 major water pump repair kit, suitable for the following pumps: R10870G, R50G This kit contains: Impeller 09959 Seal & Seat 10545 Key 04432 Gasket, cover 10103 Gasket 10171 Circlip 04259 Bearing 04257 Circlip 04259 Cam 10072 Bushing 06333 Impeller specifications: Diameter: 2-7/16" ~ 61.90mm Width: 1-1/4" ~ 31.80mm Shaft: 5/8" ~ 15.90mm Blades: 12 Keyway: 3/16" ~ 4.70mm Material: Neoprene This product replaces the following manufacturer's part nr: Sherwood Pumps order number: 12937, SHE12937 Westerbeke: 33329