B0016N5GU4 Denis Wick DW6182L Heavytop Conversion Booster for Large Bore and Bass Trombone Mouthpieces

Benefits of a Heavy Top mouthpiece on demand
Increases projection and stability
Fits most manufacturers mouthpiece
The “booster” principle is to transfer more energy through the horn and to the bell
Results in a more powerful sound, more security in high registers and a more focused tone