VEVOR 3 Spool Hydraulic Control Valve 11GPM Hydraulic Directional Control Valve Double Acting Hydraulic Valve for Tractors Loaders TanksProduct Features [DOUBLE ACTING] Our hydraulic control valve is made for operating double acting cylinders. [DURABLE QUALITY] This control valve comes with 3 spools and 1 2 " Unthreaded sealed cylindrical pipe threads O ring in out ports, with cast iron construction for long time use. [HIGH PERFORMANCE] This hydraulic relief valve range can reach up to 3600 PSI and the maximum flow is up to 11 GPM. [SPRING RETURN] All spool valves come with spring