Gas Manifold for building a kegerator is indispensable. With the regulator Gas Manifold and the manifold, you will be able to carbonate two at the exact same pressure. This may be too limiting if you plan on having two different beers on tap that require different carbonation/serving pressures. Specification: Barbed specifications: 7mm. Material: Stainless steel, aluminum Color: Silver Package List: 1 x 3 Way Beer Splitter