1.Hydraulic quick coupling 2.Hydraulic quick coupler 3.brass,steel quick coupler 4.one year guarantee 5.Different thread Hydraulic Quick couplingHydraulic quick couplerpneumatic parts ( ... steel with Nickel plated, Zincplated, Copper plated. Our pneumatic quick coupler and plugs are available insteel, brass, and stainless steel, ... ferrules. Hydraulic male ,female Germany,USA ,ISO style Quick coupler