Hull Anodes Bolt on Aluminum Anode ( AHC-20 Mil ) 2-1/2"x 6"x 12" Hull Anodes Bolt on ( AHC-20 Mil ) Core: Galvanized steel insert with holes for bolt on installation. 5/8" holes on 6" centers. Countersink holes front and back 1-1/2".

• Underwater fittings/hardware on your boat can be bonded (connected) together using heavy-gauge electrical cable between one and another inside the boat.
• An anode plate(s) bolted to the outside of the hull are connected to this bonding cable by through bolts that secure the Hull Plate Anode externally and the bonding cable internally.
• Hull Plate Anodes also provide excellent protection to the hulls of metal boats.