Introducing the Martyr Anodes Magnesium Streamlined Shaft Anodes with Allen Screw, 1-3/4" ID. These anodes are a must-have for any outboard engine enthusiast. The brand Martyr is known for its high-quality products, and this item is no exception. The streamlined design of these anodes ensures a sleek and modern look, while the Allen screw provides a secure and reliable connection. With a 1-3/4" ID, these anodes are compatible with a wide range of outboard engines. Don't miss out on the opportunity to enhance the performance of your engine with these top-of-the-line anodes.