... /4”NPT22QHM02-3/83/8”NPT22QHM02-1/21/2”NPT22pneumatic parts (DIFFERENT STYLE)It made of brass , or steel with ... : Brass, Carbon steel with Nickel plated, Zincplated, Copper plated. Our pneumatic quick coupler and plugs are available insteel, brass, and stainless ... hose barbs must be firmly fastened withhose clamps or ferrules. Pneumatic hydraulic male ,female Germany,USA ,ISO style Quick release air ...