MACK- for Trombone, small shank

MACK- for Trombone, small shank, The - Mack - is an attachment trainer for optimal control of the airflow. It is a further development of the BERP and has all the advantages of this this........even more! With the \"MACK\" the original distance between mouthpiece and trumpet remains and is not extended as with the BERP. The - MACK - can also be used together with the BERP.