Miraphone Tuba Mouthpiece TU23 Silver TU03 F/Eb Tuba (1-M): Deep, 1.433" Cup Depth, 0.276" Bore, 1.161" Cup Diameter, Silver Finish TU05 F/Eb Tuba (C-5): Very Deep, 1.681" Cup Depth, 0.323" Bore, 1.220" Cup Diameter, Silver Finish TU07 F/Eb Tuba (7-M) Shallow, 1.575" Cup Depth, 0.299" Bore, 1.240" Cup Diameter, Silver Finish TU09 F Tuba (C-2): Deep, 1.752" Cup Depth, 0.323" Bore, 1.248" Cup Diameter, Silver Finish TU11 F Tuba Helleberg (C-7): Medium, 1.354" Cup Depth, 0.276" Bore, 1.260" Cup Diameter, Si