Quick-release coupling with Micro Air Control (MAC) valve. This mounts inline between your airbrush and hose, and provides an easy method for disconnecting or changing airbrushes without the need to release air pressure or unscrew fittings. This coupling also swivels, helping to eliminate hose kinks. Easy-to-use, simply pull back the spring-loaded sleeve and the fitting separates into two pieces, a small male nipple (also called a tail) that remains attached to the airbrush and a valve body section connected to the air hose. An internal, self-sealing mechanism prevents air from escaping when the coupling is separated. MAC valve located in the body section allows you to fully adjust the pressure or completely close the airflow through the coupling during use. Standard 1/8″ BSP connections. Includes one nipple (5mm diameter) and one valve body with airflow control.