Master Airbrush Brand Set of 3 Airbrush Quick Release Coupler Plugs with 1/8 in. BSP Female Thread Connections and 5mm Male Nipple Tails (Quick Connect Coupler Not Included) The 5mm male nipple tail fits standard 1/8" airbrush quick release disconnect couplers which are not included 3 Coupler Plugs: Standard 1/8" BSP Female Fitting Threads (Male Nipple Tail 5mm) Plugs thread onto airbrushes and hoses with 1/8" size fittings, such as Iwata, Devilbiss, Master Airbrush and many other popular brands Have all your airbrushes ready for use by attaching the plugs to the airbrushes air inlet, so the they can instantly quick connected the the couplers body When the nipple plug is connected to a coupler, the plug is allowed to swivel, which prevents hose kinks