Polyethylene and metal self-dumping hoppers are designed to dump entire loads when unlatched and automatically return to upright position when empty. They possess a unique rocker system which offers a more efficient unloading by using added momentum in forward tilt. We offer stackable 2 by 2 (models up to 3 cu . yd inclusively) for freight savings. For safe transportation and unloading self-dumping hoppers are supplied with standard with forklift slots We also offer smaller models catering to ½ to 1 cu . yd which can be moved with a pallet truck.