Great Use---It is perfect for protecting your airbrush and airbrush projects from getting moisture damage. Special Design---Achieve a clean and dry air supply by using this new innovative pistol-grip type in-line moisture filter, screws straight onto your airbrush. Work Rule---The filter element enables the moisture to be separated, then you can easily remove the moisture build-up by pushing the spring loaded release valve. Mini Air Filter Water Trap ---Mini Air Filter Water Trap perfect for protecting your airbrush and airbrush projects from getting moisture damage. Convenient to Install---Screw the screws directly to the spray gun. The filter has a 1/8 in BSP internal thread that is connected to the spray gun and is connected to the hose for easy and convenient installation.