EXT electric tarp conversion is a perfect electric roll tarp system for your grain trailers. This versatile design allows for applications such as standard (straight) end trailers, sloped end trailers, and trailers with rear doors. The EXT Electric tarp conversion is a powerhouse and this is why: Fast High Torque Motor & The patented "Force Transfer Linkage" allows the arms to climb heaped loads. The best part about the linkage is it provides a constrained range of motion significantly preventing your tarp from lifting and blowing off. No other electric tarp conversion on the market has these capabilities.