Michigan Wheel's Ballistic 3 blade has a 12-3/8" diameter with 13 pitch, Right-Hand rotation propeller built to increase speed while maintaining grip. Mercury Flo Torq II interchangeable hub system compatible. Suitable for the following boat applications: Sport Boat Singles, Sport Boat Duals, Ski Boats, Pontoons, Bass Boats, Bay Boats, Flats Boats. Key Features: Stainless Steel Alloy - Highly Polished Optimum blade strength and thickness. Tapered leading edges minimize damage. The geometry of the Propeller Blades Designed in CAD Cushioned urethane hub and flared hub design Fit for Evinrude Johnson: (3 3/8") Gearcase 40 - 75 HP - Small (1984 - 2005) 40 HP 2 Cyl (1987 - 1996)48 HP (1975 - 2005) 50 HP 2 (1976 - 1979) 55 HP (1980 - 1985) 65 HP 2 Cyl (1975 - 1985) 75 HP 3 Cyl (1986 - 1992) Sprint/Formula E Specifications: Brand: Michigan Wheel SKU: 933315 UPC: 014984020411 Weight: 8.00 LBS Diameter: 12.375 Pitch: 15 Material: Stainless Steel Hub Kit: Not Included Diameter: 12-3/8 inch Blades: 3 Standard 3-Blade