The Taprite CH5400A-SS is a German coupler that is compatible with European "A" system kegs. The most popular beers that work with this coupler are Warsteiner, Fischer, Bitburger, Paul Aneer, Pauliner, and Spaten. The coupler body and probe are constructed of durable and sanitary 304 grade stainless steel. This keg tap also features a high-capacity 55-psi pressure relief valve incorporated as an integral part of the coupler body. This serves two purposes: First, when functioning with other relief devices in the system, it will prevent a key from reaching pressure in excess of recommended working pressure. Secondly, it allows the user to relieve pressure when needing to prevent or correct dispensing problems.