You can either run them all with the same gas type, or isolate each one to serve nitrogen, argon or even pure water through them.
(Not suitable for sticky substances like beer running through the inline regulator)

These regulator gas boards are the ideal way to mount your mini inline regulators to your wall so you can supply gas to various kegs at different pressures. The mounting holes for the wall mounting are pre-drilled, the holes for the regulators are pre-drilled and this makes installation really easy.

Dimensions : 260mm x 420mm