Airbrush T-Coupler G18 with one Female Block NutAirbrush compressor T adapter that allows you to connect two airbrushes to your compressor at the same time. The T adapter also includes an cover nut when you just want to use one of the outlets. Two outlets: G1 8 male BSP threads fits all our airbrush hoses and airbrushes Inlet: G1 8 female BSP threads with o ring seal Includes one cover nut with G1 8 female threads and o ring seal