The ATP50 Tarp Motor is designed with a 50:1 gear ration for fast load covering of dump trucks and dump trailers up to 28' in length. 600W direct drive 1.5HP (600 watts) 50:1 gear ratio, worm gear w/ universal 0.75" x 3" Shaft. Replaces: Mytee, Roll Rite, Donovan, Aero, US Tarp, Buyers, Pull Tarp, Mountain Tarp. 3 Year Warranty.