The Inart HS-30 Double Action Airbrush (130391012) is a precision painting tool with a metal body that allows you to separately control the airflow and the amount of paint using a single trigger: press to release air and pull back to release paint, allowing you to vary the thickness of the stroke without changing nozzles. It works by gravity, with a 7cc metal reservoir mounted on top, and has a 0.3mm nozzle that can be replaced with a 0.2mm nozzle, depending on the desired level of detail. The recommended working pressure is between 15 and 30 PSI, requiring connection to a dedicated air compressor for airbrushing, sold separately. It is suitable for detailed illustration work, model making, shoe and clothing customization, or photo retouching, where smooth gradients and fine control over the stroke are desired, impossible to achieve with a regular brush.