Thein Tenor Trombone Leadpipe S2* (.547") The mouthpiece shank is designed to fit Bach and other shanks, not Thein shanks. This is the screw for Thein Universal Ⅱ/Belcanto slides. If you need screws for Edwards, they are available for an additional 1000 yen. This item may be removed from sale if a suitable instrument is found. Thank you.