Rim inside diameter: 16.8 mm, Rim outside diameter: 24.3 mm

Cup depth: 25.2 mm, Bore: 4.8 mm

A version for trumpet & organ is available for the same price as TP57d. It is also available for trumpet and strings as TP57b (score & solo part)and TP57c (Parts). Ask about prices

This clever device from Gebr. Alexander in Mainz is an important tool which assists the player in retraining themselves to perform without the common vice of excessive mouthpiece pressure. The adjustable adapter fits between the mouthpiece and the leadpipe and allows air to escape as a warning when the player attempts to exceed the desired maximum pressure. A must for every teaching studio, and any student who fights the constant temptation to resort to mouthpiece pressure as an element in their playing.