PointZero Airbrush Manifold 4-Way Air Hose Splitter 1/8 in BSP Taps Standard fittings - 1/4 in. BSP female inlet and 1/8 in. BSP male outlets. Airflow control valves located above the outlets allow you to fully adjust the pressure or completely close each port independently. Includes an adaptor for use with a 1/8 in. air source 1/4 in. BSP male to 1/8 in. BSP female. Includes 7 exclusive downloadable e-Book airbrushing guides. Exclusive How-To airbrush e-Book series