Choose the model Propeller shaft low olive anode 19 mm (3/4") Propeller shaft low olive anode 22 mm (7/8") Propeller shaft low olive anode 25 mm Propeller shaft low olive anode 25.4 mm (1") Propeller shaft low olive anode 30 mm Propeller shaft low olive anode 31.8 mm (1" 1/4) Propeller shaft low olive anode 35 mm (1"3/8) Propeller shaft low olive anode 38 mm (1" 1/2) Propeller shaft low olive anode 40 mm Propeller shaft low olive anode 45 mm Propeller shaft low olive anode 50 mm Propeller shaft low olive anode 55 mm Propeller shaft low olive anode 60 mm Propeller shaft low olive anode 65 mm Propeller shaft low olive anode 70 mm (2"3/4)