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Single Action Airbrush

SINGLE-ACTION AIRBRUSH: Airbrush in which paint and air are mixed inside; Airbrush in which the trigger controls the flow of air only (compare to DOUBLE ACTION Airbrush ) . The trigger can be pressed for air . The amount of paint (i.e. width of spray) may be preset by adjusting a knob on one end of the airbrush body (which usually controls the metering needle and orifice ).