The Allpart Two- and Four-Post Lift Power Units are ETL tested and certified, pressure-balanced for high volumetric mechanical efficiency and contain a high-performance, pressure balanced pump for fast lift speeds. The 12,000-lb, two- and four-post lift power units feature lowering flow control, a high horsepower and high torque electric motor, a fixed relief valve at 2,750 psi and low-leakage design valves.