The SA-35 airbrush is a single action airbrush, and is specially configured to work exclusively with the Graftobian Walk-Around Airbrush System/Compressor. This is a 0.35 nozzle airbrush that has a quick disconnect air stem already pre-installed on it and ready to slide onto an air pressure control bleeder valve which is included in the purchase of a Graftobian Walk-Around System package, or available and sold separately: The quick disconnect feature allows for fast and easy change out of the airbrush from one to another when needed. This airbrush set contains a nozzle wrench, cup cover, an optional use barbed air coupling valve (for slip-on style hoses) and a crown needle cap which is great to use to help reduce dried makeup liquid build up in the nozzle cap. Additional replacement nozzles, replacement needles, and replacement hoses, are available and sold separately. For Professional Use Only. Do not purchase this airbrush to use with any other compressor or hose other than the Graftobian Walk-Around System, as this airbrush is specially configured to work exclusively with the Graftobian compressor. If you have any other questions please call us first before you buy, we will be happy to help you!