This is a Iwata Pistol Grip Moisture Trap, intended for use with Iwata Airbrushes.
Attaching directly onto the airbrush, the Iwata-Medea Pistol-Grip
Filter is the final defense to deliver clean, dry air to your airbrush.
Miniature in size, the super-fine, 5-micron filter element performs
like a full-size filter separator.
The clear filter bowl allows a visual inspection of built-up
moisture and is evacuated through a spring-loaded release valve -
without taking the filter off the airbrush.
Comfortable in the hand, the Pistol-Grip Filter acts as a handle on the airbrush to relieve muscle tension.