1.Quick release air coupling 2.Hydraulic quick coupler 3.brass,steel quick ... parts (DIFFERENT STYLE)It made of brass , or steel with nickel plated . Part number: QHM09 quick couplerFeatures:1) Female ... insteel, brass, and stainless steel, and they can beinterchangeable with many manufacturers. Recommended forgeneral purpose air, water and other ... ,female Germany,USA ,ISO style Quick release air coupling