This is the part that really gets the beer flowing! Chrome-plated brass construction ensures for longevity of the coupler, so that you can keep the beer flowing keg after keg. This "D" style coupler is the standard coupler used by virtually all American and Canadian breweries, and as such, this is the most convenient keg coupler to own in North America. One of these allows you to tap almost any keg from any American or Canadian breweries. This coupler comes with a standard 5/16" gas barb, check valve and beer nut on the gas side. Not included with this coupler are the neoprene washer, 3/16" barb liquid tailpiece and beer nut.