Cadmium free, environmentally friendly.Aluminum: For salt and brackish water. Conform to: Mil-Spec A-24779(SH) Magnesium: For freshwater only. Conform to: Mil-Spec A-21412(SH)YAMAHA ANODE KITS (SEACHOICE)SKU: 7.1925E+11$34.99PriceQuantity*Add to CartFeaturesIncludes: Block anode for gimbal housing (1) Skeg for ventilation plate (1) Fits200-250 HPMaterialAluminumCase4