Thin Electric Pusher Reverse Rotation Use LPAR18SF or LPARM12SF adapter rings Includes one set of rings from LPAR18SF and LPARM12SF Pitch: 6 inches Propeller Diameter: 7 inches Hub Diameter: 0.50 inches Hub Thickness: 0.33 inches Shaft Diameter: 1/4 inches Product Weight: 0.28 oz. Color: GREY