After market Ref: Sherwood 8000K 08000K, Onan 132-0415, Kohler 359978, Sierra 23-3314 23-2004, CEF 500190, JMP 7013, DJ Pump 09-107-0601
Diameter: 1-9/16"(40mm), Width: 3/4"(19mm), Shaft: 7/16" (12mm), Drive: D-Slot 7/16" (11mm). Made of Neoprene Rubber and Brass Hub, Have good seawater corrosion resistant property