An essential practice aid, the mouthpiece rim is a tool to achieve consistent elegance and efficiency to your tone and articulation.  A clear vocal tone on the rim will INSTANTLY clean up your sound and articulation on the trombone.  Use it as a superior solution whenever you would choose to buzz the mouthpiece in your practice.

The Griego .75 has a diameter of 1.128 which is slightly larger than a Schilke 59 or a Bach 1¼G