Impeller is key driven with 8 outer rubber splines.
Overall diameter 65mm with a depth of 51mm, Shaft diameter of 16mm.
Suits a Fynspray WSP 3/4 Port Pump (port diameter actually measures 1") with the two grease caps.
CASSELL MARINE SPECIAL - INCLUDES Cover Plate Gasket
Also suits older style Argo Cam Drive Pumps
Impeller only does not include a pump