Durable Quality - This hydraulic directional control valve comes with 2 spool, with cast iron construction for long-time use. Spring Return - All spools are standard double acting with spring return to the neutral position which is ideal for double-acting cylinders. High-Efficiency - The relief valve range is up to 3625PSI and the maximum flow is up to 21GPM. Wide Application - Fit for small tractors, tractors loaders, log splitters, and etc.