... with nickel plated . Part number: QHM09 quick couplerFeatures:1) Female Male different thread.(NPT ,BSP,BSPT,UNF....)2) Media: Compressed air ... steel with Nickel plated, Zincplated, Copper plated. Our pneumatic quick coupler and plugs are available insteel, brass, and stainless steel, ... must be firmly fastened withhose clamps or ferrules. Hydraulic male ,female Germany,USA ,ISO style Quick coupler