The MARTYR Magnesium Yanmar Saildrive Split Ring (19644002660KITM) is a specialized cathodic protection solution designed specifically for Yanmar SD20, SD25, SD30, SD40, and SD50 saildrives. This kit features a two-piece split ring design, which is highly advantageous as it allows for quick anode replacement without the need to remove the propeller. Engineered exclusively for freshwater environments, the magnesium alloy provides a high driving voltage to prevent galvanic corrosion and pitting on the saildrive housing and internal components. The kit includes the necessary stainless steel mounting hardware and is designed to fit over a previously installed adapter kit (part number 196440-02690).