Using these adapter caps is easy! Simply remove the dropper style cap that comes with your 2.25 oz Graftobian F/X Aire™ Airbrush Makeup bottle and replace it with this adapter cap by screwing it on tightly.
This will allow you to then attach the bottle directly to the bottom feed airbrush, such as Iwata HP-BCS, by inserting the cap's siphon tube directly into the airbrush fluid feed. These caps make airbrushing a snap to change out colors, and to flush the airbrush with Graftobian Airbrush Cleansing Fluid.
You want one of these for each color of Graftobian F/X Aire™ Airbrush Makeup you will be using in your airbrush session. It's strongly suggested that you also have one dedicated to a bottle of Graftobian Airbrush Cleansing Fluid to make flushing or cleaning of your airbrush quick and easy. Always keep a few of these adaptor caps on hand as spares just in case you need them for new colors or other needs.