4-Way Airbrush Air Hose Splitter and Regulated Metering Manifold" /> Master Airbrush Brand 4 Way Airbrush Air Hose Splitter and Regulated Metering Manifold. Use multiple airbrushes from a single air supply hose Includes a 1/4'' BSP female inlet and 4 - 1/8'' BSP male outlets that allow you to split your air supply up to 4 ways Each air outlet has its own air regulation valve knob to customize the pressure to each of the hose splitters Attach to airbrush hoses with 1/8" BSP size fittings, such as Iwata, Devilbiss and Master Brand airbrushes Also includes a 1/4" to 1/8" bsp air inlet conversion adapter for use with 1/8" bsp hoses.