21 GPM power beyond adapter sleeve for hydraulic control valves

21 GPM high pressure power beyond adapter sleeve for Magister Hydraulics monoblock hydraulic control valves HCV 21 series. Used to connect a valve to an existing valve in a hydraulic circuit. Must be installed into “N” Port on 21 GPM hydraulic control valves series. The outlet on the valve in which the adapter is installed must be connected to the tank. The male end has BSPP 3/4 thread, and the female end has SAE 12 thread. Zinc plated.