Iwata QuickFit Quick Disconnect Airbrush Male Adaptor (I1604)
Used to release your Iwata airbrush from an air hose equipped with with the Iwata. The QuickFit Air Hose Adaptor screws onto the air hose and stops the flow of air until the QuickFit Airbrush Adaptor, screwed onto the airbrush.
If you already have the Quick Disconnect Set (I-160-3) and are looking to quick connect additional iwata airbrushes to your air hose then this is the fitting you are looking for. Ideally it would be nice to have a (QD) Male Adapter for each additional airbrush or, at the very least, one for each of your most popular airbrushes. Simply leave the fitting attached and swap out your brush using the same air hose that has been outfitted with the female (QD) Hose Joint.