The Alliance E3A Euphonium Mouthpiece is a high-quality brass mouthpiece designed specifically for euphoniums. Cup Diameter: 26.00mm Rim: 6.78mm Bore: 7.40mm Cup: Standard Comparison: Denis Wick Classic SM4/Ultra SM4U, Bach 4G, Schilke 52D Developed with Steven Mead for the Besson Euphonium. A versatile mouthpiece with a rich sound, easy response and an excellent high register. Supplied with Alliance leather case. Hardly used as I found I prefer a larger size. currently retailing for £76 new
