Warburton Special Optimum Pressure System - Special OPS BR_ED_INST Some players who put a

Some players who put a lot of energy through the instrument will find the booster useful to stop the sound becoming too bright and overbearing

GARD BAGS LIMITED CONSUMER WARRANTY

Reduces potential frictional noise

It DOES NOT CONTAIN wax

Fits even the largest of valves including Thayer valves

Warburton Special Optimum Pressure System - Special OPS BR_ED_INST Some players who put aWarburton Special O. P. S Optimal Pressure System There's no such thing as "no pressure" when it comes to playing the trumpet. However, too much pressure is a familiar problem with most players at some point in their playing career. The specially designed Optimal Pressure System fits right into your trumpet and works with your normal mouthpiece top to teach you to use less pressure while actually playing!