Jabsco 50410-1251 Bronze ball bearing pump, substitute for Volvo HALF Cam engine pump. Flange Mount 1-1/4" Pump Bronze body Neoprene impeller 316 stainless steel shaft, ball type bearings, 1-1/4" hose barb ports. The ideal solution for raw-water marine engine cooling. Designed specifically for engine cooling applications. Corrosion resistant bronze housing and shaft with permanently lubricated ball bearings. Self-priming with the ability to operate in either direction at variable speeds. Uses flexible impellers with a removable end cover for easy service.