The Medium Duty Low Profile 90 degree self-dumping steel Hopper feature a full ninety (90) degree dump angle with a cushioned rubber bumper stop. The low profile design is essential for convenient loading. Dumping with a fork truck is quick and simple. A cable is pulled from the seat of the fork truck to dump the hopper. The unit returns to an upright and locked position when lowered to the ground. Fork pockets are 22" long and are capped on the end to allow for 90 degrees dump. The included safety restraint/chain must be securely attached to the lift truck carriage without slack. Models with same overall width may be stacked. For example, models H-25 may be stacked with H-50's, the H-100's can be stacked with H-150's, while the H-200 hoppers can only be stacked with other H-200 series models. Never stack hoppers more than 3 high.