This is a lightweight fiberglass case for two trombones made by Marcus Bonna in Brazil. Bonna double trombone cases are available in three sizes, and this is the smallest size. It's designed to hold one tenor trombone and one alto trombone. From testing we find that nearly any instruments will fit. We tested a Bach 42A tenor with Hagman rotor and a Conn 36H alto with Bb rotor, and with the right arrangement of interior pads, they fit just fine. Other similar instruments should fit equally well. The photos show a Bach 42AF tenor trombone and an S.E. Shires alto trombone.
This case has a fiberglass shell which is covered by a nylon outside cover. The cover is easily removable if cleaning, repair or replacement is necessary. There is a small amount of interior storage space plus an outside sheet music pocket. Several fabric covered foam pads can be arranged inside to customize the fit to your instruments.
This is a tough case, but Mr. Bonna recommends you consider it to be hand luggage. This may not be the best case to hand over to airline baggage handlers. (But what case is?)
Accessories included are: shoulder strap, backpack straps, double mouthpiece pouch, ID tag, external sheet music pocket with zipper attachment.