Master Airbrush Brand Mini Inline Air Filter Airbrush In-Line Mini Air Filter/Water Trap. Perfect for protecting your airbrush and airbrush projects from getting moisture damage! Achieve a clean and dry air supply by using this new innovative pistol-grip type in-line moisture filter; Screws straight onto your airbrush. The 5-micron filter element enables the moisture to be separated, then you can easily remove the moisture build-up by pushing the spring loaded release valve . Filter has 1/8" BSP Female Threads that attach to the airbrush and 1/8" BSP Male Threads that connect to the hose; Fits all 1/8" BSP Threaded airbrushes such as Iwata, Devilbiss and Master Brands.