Carl Fisher GR MouthpiecegrThe CF Signature Series Mouthpiece Line is the result of a continued collaboration between Carl Fischer and Gary Radtke. Carl is one of the most in demand trumpeters today, touring with Billy Joel, performing with his own groups, and conducting masterclasses all over the world. Carl needed a line of mouthpieces that would cover a number of musical demands and feel consistent throughout the line. The result is the CF Signature Series. Jazz: Very open