Mouthpiece for french horn (various models),Gebr. Alexander Mainz Silver-Plated Mouthpiece for French Horn Size 8 FS JP USD | eBay,The Horn Guys - Alexander 155 6-Valve Rotary F Tuba with Quint Rotor,1950s Alexander 154 Eb Tuba | Brass and Pipes,Tuba Mouthpiece – silver plated | Alliance Brass