The Tecnoseal X13AL Shaft Anode is an essential component for protecting your boat's shaft from corrosion. Made from high-quality aluminum, this anode is designed for a 3-inch shaft diameter, ensuring a perfect fit for your marine needs. Its durable construction provides long-lasting protection, extending the life of your equipment. Easy to install, the X13AL helps maintain optimal performance by preventing galvanic corrosion, making it a must-have for any boat owner. Keep your vessel in top shape with this reliable anode!