Engineered for safety and economy. Bump Release Hoppers are innovative and automatically dump on contact with the roll-off container. Hoppers are perfectly balanced to roll forward when loaded, dump completely and automatically return to upright, locked position ready for reloading. Continuous welding helps to prevent dripping of wet materials (leak-proof hoppers are available upon request). Formed smooth edge around top and pouring lip for safety and strength. Extended sides prevent side-wise scattering of material.