Denis Wick Classic. Maurice Murphy, for 30 years Principal Trumpet of the LSO, and a truly legendary figure in the world of trumpet playing, has teamed up with former LSO Principal Trombonist, Denis Wick, to design these new trumpet mouthpieces. Reflecting Maurice's unique playing style, they all provide a brilliant and powerful yet lyrical sound, with superb control at all dynamics. • Cup Diameter (inner): 17.50mm • Cup Diameter (outer): 28.20mm • Rim Width: 5.35mm • Bore Size: 3.70mm • Backbore: V shaped.