Can be attached before the hose or directly onto the airbrush, the HS-F4 mini filter is the final defense to delivering clean, dry air to the airbrush. The clear filter bowl allows for a visual inspection of built-up moisture which can be evacuated through a spring-loaded release valve without disconnecting the filter.

If connected directly to the airbrush it is comfortable in the hand and this mini filter acts as a handle on the airbrush to relieve muscle tension.