Magnesium Anode Kit Fits Yamaha 150 - 200 HP Outboard Motors Includes Hardware Replaces Yamaha 6G5-45251-01M, Yamaha 6J9-45371-01M, Martyr CMY150KITM, Seachoice 95221, Sierra 18-6133, Tecnoseal 21101MG Magnesium is for fresh water use. US Military Grade Magnesium Anode Kit. Magnesium Anode Kit Fits Yamaha 150 - 200 HP Outboard Motors Includes Hardware Replaces Yamaha 6G5-45251-01M, Yamaha 6J9-45371-01M, Martyr CMY150KITM, Seachoice 95221, Sierra 18-6133, Tecnoseal 21101MG. This Is A US Military Grade Magnesium Anode Kit Made To The Highest Quality. Magnesium Is For Freshwater Use. Fits the following Yamaha outboard models: F150 & VF150 4-Stroke - All Models F175 4-Stroke - All Models F200LB F200XB F200XCA 150 HP 2-Stroke - All Models 1988 and Newer 175 HP 2-Stroke - All Models 1990 and Newer 200 HP 2-Stroke - All Models 1988 and Newer 225ETLD 225TLR 225TXR