This Martyr Anodes aluminum anode is a great addition to your Yamaha 200-300HP sterndrive motor. It is designed to provide excellent performance and durability for your boat. The anode is compatible with a variety of Yamaha motors and is made from high-quality materials. It is important to note that this item is a closeout sale and there are no returns. Please make sure that it is the perfect fit for your boat before purchasing. If you have any questions or concerns, please feel free to contact us.