Product Name： Heavy-duty dumper Category： Belt Conveyor Manufacturers： Golden Sun Order>> Product Details Heavy-duty Dumper can discharge at any point in the horizontal section of the conveyor. Bilateral dumper can only discharge the two sides at the same time while the unilateral dumper can discharge both left and right.It's two-motor drive. http://www.gs-conveyor.com/Products/BeltConveyor/4.html