This is our belt reduction drive for the popular HF Predator engine. We've made a lot of updates and improvements over the last couple years, and this is the newest version. Standard reduction ratio is 1.68:1, with an optional 1.9:1 available as well. Except for bottom pulley, all aluminum and stainless steel construction and hardware. Works great on mini airboats, bowfishing boats, flounder rigs, hovercraft, and more. Visit www.banditairdrives.com for more info.