A nice little accessory for your airbrush set-up, this coupling makes it a breeze to disconnect your airbrush from the hose, while sealing off the hose. No tools required, and you don't have to turn off your compressor. My only complaint is that I use a VL suction feed airbrush, and this connector doesn't allow me to use the 3 oz. bottles. It works great with the 1/4 oz. cup and the 1/2 and 1 oz. bottles, though. anyone using a gravity-fed Paasche airbrush should have no problems at all.