Feature: 4 Spool valve with compact design allows for installations in tight areas All spools are standard double acting with spring return to neutral position which are ideal for double acting cylinders Used for open center systems (Pump to Tank Flow) - closed center option available Anti-drop load checks on each spoolPrecision ground and hard chrome-plated spools assure a long life High-tensile strength cast iron monoblock construction SAE O-Ring ports ensure solid seal and prevent blockages Capable of Closed Center or Power Beyond (conversion plug required) Vertical or horizontal handle mount Adjustable Relief Val.