Martyr Zinc Streamlined Shaft Anode 3in 76mm CMT-X13

Martyr zinc streamlined shaft anode (part #CMT-X13) for 3″ (76mm) propeller shafts. Split clamp-on design with streamlined profile to minimize drag compared to standard collar anodes. Suited for large inboard diesel installations, commercial vessels, and heavy workboat applications. Zinc alloy construction for saltwater and brackish water galvanic corrosion protection of the propeller shaft and surrounding underwater hardware. Replace when the anode is 50% or more consumed, pitted, cracked, or loose. Install on a clean bare-metal shaft surface; do not paint the anode. Ensure both halves are evenly clamped and fasteners are torqued securely. Verify shaft diameter before ordering.