Williams 5ES05H2GR Electric Hydraulic Pump With 2 gal 4-Way 3-Position Solenoid Valve, 1/2 hp, 2 Stages, 293 cu-in/min 1st Stage, 18 cu-in/min 2nd Stage Flow Rate, 350 psi (1st Stage)/10000 psi (2nd Stage) Pressure