The Exchangeable Hub System from Michigan Wheel is made to spin under heavy pressure to protect your lower unit while absorbing shock and stress from gear changes. Mercury's Flo-Torq II hub system and XHS II are interchangeable, which could result in cost savings when changing or upgrading your propeller. It has the new design with less noise when shifting between forward and reverse. Key Features: Material that is strong, dependable, and of excellent quality Built to be quick and easy to use Enhances the performance of boat engines In use in aquatic environments Pre-assembled and oiled Corrosion-free One Piece Material Cushion Hub Is Designed For Saltwater Environments Continues To Be Interchangeable With Mercury Propellers Using The Flo-Torq II Hub System This item replaces: HK216, 116, 216, 14984024754 Specifications: SKU: HK216 UPC: 014984024754 Weight: 1.30 LBS G/C SIZE: 3.25 DRIVE TYPE: 13 Spline HUB TYPE: Hub Kit Alternate Products SKU: "HK116", "HK216" Manufacturer Part Number (MPN): 216