One of the best all purpose baritone mouthpieces. The hard rubber Berg Larsen has a beautiful tone, with enough bark and projection to make the bari sound great, but without thinning out. Straight sidewalls, bullet chamber. Tip opening measures right at 0.110″ and the facing was just checked up by Erik Greiffenhagen, who does superb mouthpiece work. This responds effortlessly in all registers. Recommended!