I am selling a Techoseal R3 Rudder Anode, part number unknown. It is new out of the box and comes as shown in pictures. It is zinc constructed and is 3 3/4" Diameter. For more information please contact a dealer in your area (BB /AE124 / 1010401). Shipping cost is for the continental United States (lower 48) only. For shipping outside of the continental United States please inquire about shipping cost before purchase.