Close Mount Cylinder Load Hold Valve Bodies. These bodies are suitable as a single or double counter-balance valves (CBPA) or as a piolt operated check valves (POCI) directly attached to a cylinder port. Used special Child port adaptor ZC52-0909, ZC52-1212, ZC52-1412 or ZC52-1717 to attach direct to the cylinder port. Material: Aluminuim rated to 210 bar (3000 PSI) Steel Bodies rated to 345 bar (5000 PSI) Ports: 9/16" UNO to 1-1/16" UNO