This interchangeable hub assembly's Delrin cushioned sleeve prevents damage and stress produced by shifting gears, and it's designed to spin under heavy impact to protect your lower-end unit. Michigan Wheel's XHS II V4 HUB KIT (HK227) offers great performance and versatility. Mercury's Flo-Torq II hub system for the Vortex and Apollo Prop Housings is compatible with the XHS II Hub, making it an excellent replacement or spare prop option. Key Features: High performance and versatility make this an excellent choice for a spare or replacement prop. The Delrin cushioned sleeve relieves the force and stress of shifting gears and is engineered to spin under severe impact to preserve your lower-end unit. OMC Sterndrives V4 Gearcase - 1968 to Present Compatible with Evinrude/Johnson Outboards Mercury's Flo-Torq II hub system is interchangeable. It's made to fit Vortex and Apollo prop housings. Product Specifications: SKU: HK227 UPC: 014984016469 Weight: 2.00 LBS G/C SIZE: 4.25 DRIVE TYPE: 15 Spline HUB TYPE: Hub Kit Quantity: 1