Grex G-MAC MAC Valve with Quick Connect Coupler and Plug Compatible with all brands and types of airbrushes, giving you the freedom to put airflow control on any of your airbrushes, instead of being restricted to a specific airbrush Comes as a quick connect air coupler allowing you to easily switch between airbrushes to give every airbrush the ability to control airflow. Attaches to the air inlet of your airbrush. This provides better balance compared to having the airflow control below the head of the airbrush Designed with a large dial to allow easy air pressure adjustments. This is particularly helpful when spraying and adjusting air pressures simultaneously Capable of achieving fine adjustments to give precise air flow control. Three full dial rotations to change from zero air flow to full air flow.