Patrick 85M (Mike Haynes Model) Trumpet Mouthpiece Inner Diameter: 16.256mm This is Mike Haynes' signature model, designed for lead playing with a shallow cup. *One-piece type. There are some minor scratches on the shank from use, but there are no major scratches, dents, or plating wear that would affect playing. This is a used item, so please refrain from purchasing if you are sensitive to such things or have any concerns.