Aluminum Skeg Anode Fir Yamaha 200-250 HP Outboard Motors Replaces Yamaha 61A-45371-00A, Martyr CM61A4537100A, Tecnoseal 01124AL, Camp 61A-45371. Aluminum Skeg Anode Fir Yamaha 200-250 HP Outboard Motors Replaces Yamaha 61A-45371-00A, Martyr CM61A4537100A, Tecnoseal 01124AL, Camp 61A-45371. This Is A US Military Grade Aluminum Anode Made To The Highest Quality. Made In The USA. Aluminum Is For Salt And Brackish Water Use.