Denis Wick SM3 Rim Diameter: 26.4mm This is an SM series mouthpiece supervised by Steven Mead. With a very deep shank and streamlined shape, this mouthpiece offers a wide range of tones and a rich sound. Professional player Ayaka Sato uses the same model. Overall, it's in very good condition, but it has been used a few times since purchase, so there is some wear and tear on the shank, etc. - Denis Wick - Euphonium Mouthpiece