EXT® Conversion is the most wind resistant electric tarp on the market. The arms are made from bi-hollow aluminum to provide a reliable consistent roll! This electric roll tarp system is available for Grain Trailers, Farm Trucks, Fertilizer Spreaders, Belly Dumps, Dump Bodies, Floaters, and Fertilizer Spreaders. • Fastest high torque motor • Patented "Force Transfer Linkage System" that allows the arms to climb heaped loads. • Optional Integratable Remote Box.