A brass threaded quick coupling is an element used to connect lines and hoses. It is made of brass with a threaded end and a quick connecting head at the other end.

Flexible brass quick coupling is a kind of removable coupling used for connecting pipelines. It is made of brass material with excellent corrosion resistance and mechanical strength. This coupling is designed with a quick-insertion and removal connection mechanism, which makes it easy and quick to connect and disconnect hoses or pipes without the use of tools.