The Universal Contoured Tenor Trombone PRO PAC Cases have been completely redesigned. The case is now streamlined and are simply terrific. Designed to fit most tenors with F-attachments it also accommodates up to 9.5 bells. The interior features velvet lining soft padding tie down straps secured by hook n loop accessory compartment double mouthpiece section and padded slide cover. The exterior features a lightweight protective frame quick hook n loop closure durable ballistic nylon exterior large exterior pocket with built-in organizer and shoulder strap. This case is also backpackable with our optional backpack strap (model# BPSTRAP.)