Mercury 888756K02 Aluminum Anode Kit - Fits MerCruiser MR & Alpha One SterndrivesMercury Aluminum Anode Kit 888756K02 is designed to help protect Mercury MR and Alpha One drives from the harmful effects of galvanic corrosion in fresh and saltwater applications.Engine Part ApplicationFits 1984-1990 MR & Alpha One drives (s/n 6225577-0D469828)Key Product Features: Fits MerCruiser MR and Alpha One Drives from 1984-1990 (serial No. 6225577 - 0D469828); For freshwater and saltwater use; Complete kit includes trim tab anode, gimbal nut anodes, drive shaft plate anode and attaching hardware for fast and easy replacement; Mercury parts and accessories are backed by decades of experience in engineering, testing and manufacturing to provide the best fit, function and performance;