Greg Black Bass Trombone Mouthpiece 1G Light .312#2 Rim Diameter: 29mm, Throat: 7.92mm When new, the shank had some play, so it has been modified to eliminate the play. Therefore, there is some plating wear on the shank due to the modification. The product condition is listed as "No noticeable scratches or stains," but this information applies to parts other than the shank.