Vortex is a high performance aluminum propeller that utilizes the XHS Xchangeable hub system. The Vortex propeller features high performance blade geometry, precision-balanced blades, and high gloss powder coat. This propeller's blade design is engineered to enhance hole shot and increase cruise speed without sacrificing top-end speed. The XHS Xchangeable hub system makes the Vortex interchangeable with the Mercury Flo-Torq II system. Great choice for a replacement or spare propeller for boaters.