Mercury's Flo- Torq IITM system is interchangeable with Apollo propellers, which are designed to use Michigan Wheel's industry-preferred XHS Hub System. On heavyweights, the Apollo 4-Blade propeller is to improve the holeshot. This propeller is suitable for water sports tugging and towing. High blade geometry, high luster finish, XHS / XHS II hub kit, and interchangeability with Mercury's Flo-Torq II hub. The Apollo 4-Blade's technology makes it the ideal propeller for a wide range of boats. The following are the recommended boat applications: Aluminum Consoles, Bay Boats, Walleye Boats, Offshore Singles & Duals, Sportboat Singles & Duals, Ski boats. Key Features: Most outboard and sterndrive applications are compatible. The majority of outboard and sterndrive applications are interchangeable. On large weights and in aquatic sports, the 4-blade design increases hole shot. Specifications: Brand: Michigan Wheel SKU: 993214 Weight: 14.00 lbs Materials: Stainless Steel Number of Blades: 4 Rotation: Left hand Diameter: 14-3/8 4-Blade*These applications may require anode/trim tab replacement.