The contractor grade flatbed dump trailer line has all the features of the standard duty dump trailers with these additions: Premium Radial tires, a heavy duty drop-foot jack, heavy duty slipper spring suspension, heavy duty adjustable plate for 2 5/16″ ball or pintle ring. This model is built to accept slide-in sideboards. This adaptable feature allows for simple side loading of pallatized construction or landscaping materials. The fully self-contained hydraulic system gives stable and powerful dumping action with its dual single stage cylinders. This hydraulic flatbed dump trailer is an unbeatable value!