From the Manufacturer The G-MAC gives you unrestricted precise control of airflow for your airbrush right at your fingertips, allowing you to make real-time air adjustments while you're painting. 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.
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Grex Airbrush G-MAC Micro Air Control Valve w/Quick Connect Coupler & Plug [GXXGMAC] - HobbyTown
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