Threaded quick coupling, 8mm, 9.5mm pipe Nozzle connector, Tee, Elbow, End, ... ball valve and pump.If you order the threaded quick coupling, when you install the system, you need to use tool ... retainer, the tubing will be locked by inner compression ferrule. The threaded quick coupling is very suitable and excellent for stainless steel ... will be displayed you from our system engineer. Flexible Coupling