Original Steves Shires bass trombone made in mass .this is not Q model made today this Bass trombone is the Steve Shires .the bell is rose brass 91/2 inch the slide is B62 with #3 lead pipe .the tuning slide is yellow brass the inline valve ARE Original ED Thayer steel valve .also very hard to find today the horn is excellent condition no dents or slide wear .if you re looking for a vintage shires Bass trombone this one will not let you down .