GR Piccolo Cornet / Trumpet Adapters are revolutionary in design. These adapters don't simply adapt the standard GR Piccolo cornet shank mouthpiece to your trumpet receiver. Each adapter features a unique blow resistance to dial in the perfect match to you and your horn!
#41 Adapter - High Compression, extreme upper register.
#43 Adapter - Medium Compression, all around work.
#45 Adapter - Open Blow, huge sound.