High quality aftermarket impeller kit. Includes impeller and O-ring. Fits pump numbers: G9901 , G9902 , G9903 , G15 , G21 , G30-2 , G30-2B , J70 , K75 , K75B Replaces : Sierra 18-3060 Sherwood 9959 Jabsco 18838-0001 Volvo / OMC 3854286 Crusader 22212 Yamaha YSC-101-03-01-0C Yamaha YSC-101-03 Impeller Specifications: Width: 1-1/4" (31.7mm) Diameter: 2-7/16" (61.9mm) Shaft: 5/8" (16mm) Drive: 3/16" key Material: Neoprene Silhouette: 12 blades New impeller kit: includes impeller and o-ring. Fits pump numbers: G9901 , G9902 , G9903 , G15 , G21 , G30-2 , G30-2B , J70 , K75 , K75B Replaces : Sierra 18-3060 Sherwood 9959 Jabsco 18838-0001 Volvo / OMC 3854286 Crusader 22212 Yamaha YSC-101-03-01-0C Yamaha YSC-101-03 Specifications: Width: 1-1/4" (31.7mm) Diameter: 2-7/16" (61.9mm) Shaft: 5/8" (16mm) Drive: 3/16" key Material: Neoprene Silhouette: 12 blades