Hard Case for Tenor Bass Trombone Normal Type With backpack straps Color: Black Used for several months with the backpack straps. It seems to be able to store most manufacturers' tenor bass trombones with rotary valves, including open wrap models. There are a few scratches (see photos). It takes a little practice to close, but it closes properly. It's very durable, so you can carry your instrument with confidence. Thank you for looking.