This is a vintage hard rubber Berg Larsen mouthpiece for the tenor sax. Dating to around the 1970's, this piece has the rolled off shank and stamping of 105/0 M. It has since been professionally opened a hair by Phil-Tone, measuring now right at .110”. He kept the original baffle and bullet chamber. This piece has some light ligature scratches right on top of its body, but no cracks, chips, or major wear. It plays with a lot of projection without sacrificing warmth or character.