Back Bach Trombone Mouthpiece 1 Silver Plated Finish Thick 3411HGM 1/2GM (For Tube)

---------------------------------------------------------------------- Larger throat and backbore than 1 1/2G. It has a large dynamic range with little resistance. Deep and warm tone. ■Diameter: 27mm ■Cup depth: D (deep) ■ Rim thickness: MW (medium), quite round rim.