Partial Guinness Stout Conversion Kit - Chrome Faucet + U System Coupler + Tank Adapter Partial kit used to convert a your existing draft beer system to dispense Guinness. European Specialty Faucet in chrome. Guinness U-System keg coupler is included. Adapter included to connect your CO2 regulator to the nitrogen air tank. Please note, this is a partial Guinness conversion kit.