Quicksilver Thunderbolt dominates high-horsepower boating! The Thunderbolt 3-Blade Stainless Steel Propeller uses the Quicksilver Flo TorQ Hub System, so it's easy to replace or repair. The Thunderbolt Propeller dominates high-horsepower boating with its large diameter and high output blade geometry. Specifically designed to handle high horsepower, the Thunderbolt is the perfect propeller for V-6 outboard offshore fishing boats, sterndrive V-bottom sport boats, cruisers, and race boats. This modular propeller uses the Quicksilver Flo TorQ Hub System, so you can easily switch props, change pitch, change from aluminum to stainless, or replace a bent propeller. It also works with the Michigan Wheel XHS Hub Kits. This is the propeller housing with blades only. Hub Kits are sold separately.• Quicksilver Part Number: QS5007X• Quicksilver Thunderbolt Prop Series A• Stainless Steel• 3 Blades• Diameter: 15.25"• Pitch: 19"• Left Hand Rotation Recommended for big V-6 & V-8 engines Exchangeable hub system Prop Only. Hub Kit Sold Separately. | Quicksilver Thunderbolt 3-Blade Modular Prop / Stainless 15.25 dia x 19 pitch LH