This is a lightweight fiberglass case made for screw bell French horns by Marcus Bonna in Brazil. The fiberglass shell is surrounded by a nylon cover that is easily removed if repair or replacement is ever necessary. The MB5 High Compact case includes backpack straps, a shoulder strap, several movable foam pads, storage pouch, a double mouthpiece pouch and ID tag.
This case is a version of the venerable MB5 case to hold small to medium double horns with screw bell, and two mutes.
This version is a bit shorter than the standard MB5 for portability, and is also tall enough to fit horns with bell flares taller than 13cm.
Photos are mostly of the standard MB5. We'll update sometime when we have one here to inspect.