I got this case for a Courtois AC280BO. The factory case was slick but just didn't offer much room for anything beside the horn. I had been using a fabric covered zippered case but it was starting to show some wear. I have an SKB case for an euphonium and liked how well it protected that instrument. I received the case today and immediately put my horn in it. The horn easily fit into the case and I was pleasantly surprised by a large covered area within the case that can be used for a mouthpiece or lubricants. The case has three latches, one of which has a hasp for a small lock. The case also has a small recessed pouch on the outside--not sure what it would be good for.