Propspeed Small Kit 200mlFouling of running gear is a constant headache for boat owners, requiring expensive and time consuming grinding and sanding to remove marine growth at every haul out. Take control with Propspeed; the cost effective way to keep your marine vessel performing at its peak. Propspeed is the most inexpensive upgrade a boat owner can implement to increase speed and performance. For use on: Propellers, Rudders, Shafts, Bow Thrusters, Trim Tabs, Zeus Drives,