7/8" 2 Bolt Zinc Shaft Anode ClearancePropeller Shaft Zinc Anode 7 8 Cadmium free aluminium anodes manufactured to conform to US mil spec MIL A 18001 K composition. Supplied with 304 grade stainless steel socket head cap screws and captured nuts. Sized to suit imperial prop shaft. Cast perfectly round to ensure tight fit with full contact. Shaft Diameter: 22. 2mm Outer Diameter: 54mm Overall Length: 54mm Weight: 0. 5kg Mount Screws: 2 CMX02