This Vevor 4 qt. Hydraulic Pump is a single-acting power unit for fast, hydraulic powered lifting and gravity-powered lowering. It features a sturdy 4-quart steel reservoir paired with a 12V DC motor that can provide strong power for hydraulic systems like dump trailers, forklifts, lifting platforms, and more. This unit outputs a maximum pressure of 3200 psi, with a safety release valve that automatically releases pressure when the safety limit is exceeded.