High performance propellers with an exchangeable hub system! Michigan Wheel's Xchangeable Hub System absorbs impact and stress caused by shifting gears and is designed to spin under significant impact to protect your lower end unit. XHSTM is also designed to be interchangeable with Mercury's Flo-TorqTM II hub system, making it a great choice for a replacement or spare prop. Backed by Michigan Wheel's limited lifetime warranty. VortexTM High Performance Aluminum replacement propellers feature high performance blade geometry and high gloss black powder-coat finish. Propeller and Hub Kit are sold separately. XHSTM Hub Kits include forward thrust washer, inner hub, and aft drive adapter. Kits do not include prop nut, tab washer, or cotter pin. All props listed are standard right hand rotation.