This special pressure vessel, the Air Rail, has been designed by airbrush artist, Terry Hill, to not only allow for 6 brushes to be in use at one time, but also to give each 2.25 oz. bottle of Graftobian F/X Aire(tm) enough room to include tubes and clamps, etc. This piece of machining art is really the functional lynchpin of the Graftobian Deluxe Fantasy Airbrushing System.
Each manifold has 8 ports total: 6 are female quick connect (QC) fittings, which the brush hoses attach to. The 7th is a male (QC) supply hose connection which runs to the air supply via a hose. The 8th is a female QC fitting for an additional manifold to snap into it.