This hydraulic quick-connect hose coupling meets the standards for ISO 16028, has a length of 2 1/16 inch, a maximum operating pressure of 5,800 psi @ 70 Degrees F and is made of steel with a clear chromate finish/coating. In addition, it has a 9/16"-18 thread. Plus, it has a UNF connection type. This hydraulic quick-connect hose coupling includes valve plus it is for use on manufacturer numbers 6ffs25, 6ffs56un.