Need to set two different CO2 pressures for different beers on tap? Then you'll need two regulators to do it properly. With this MK4 Dual Pressure Regulator, you'll be able to screw it into your CO2 bottle and fire away with two different pressures. 

MK 4 regulators come with a Duo Tight fitting. For a barbed fitting you will want to add Swivel Connectors.