This is a very small fiberglass travel case for a tenor trombone with F-attachment and screw bell flare, made by Marcus Bonna in Brazil.  The hand slide fits in its own case which unzips from the main case.  To make it work, you remove the F-attachment crook and store it in the compartment underneath the trombone body.  It's unusual, but when you need to be really small, this does it.  I don't know exactly which brands of instruments it does and does not fit, though it's supposed to be fairly universal given a few constraints.  Most F-crooks will fit in the compartment.  Important: make sure the F-attachment outside sleeves of your horn don't protrude past the tuning slide bow or it won't fit.  Conn 88HO/88HTO is a problem, 88H closed wrap is fine.  Back 42BO and Shires are fine.  Photos show a Michael Rath R4F.

The maximum length inside the case is 61cm.  MB also make this case in 67cm, 71cm and 74cm lengths.  This isn't those.  This is the shortest one.

In black nylon with fiberglass shell.  Includes shoulder straps and mouthpiece pouch.

Note: This case does _not_ fit jazz trombones, which tend to be narrower and longer.  This only fits orchestral style large tenor trombones that have some girth and a shorter length body and tuning slide.  

Dimensions are about 8x10x34"