The original Guinness coupler! This keg coupler, popularly known as a tap, works on Guinness, Harp and Kilkenny kegs, as well as Smithwicks, Magners and a few select others. It is a "U" style keg coupler that is not commonly used by breweries, but is used by those mentioned. If you want to tap a keg of any of these, you will need a "U" coupler! This coupler includes the gas side connections. Not included is the a 3/16" liquid tailpiece, beer nut and neoprene washer.