This is the BAGS detachable bell french horn case. It's an extremely lightweight but durable case that's easy to carry. It comes with padded backpack straps. Its cover is made of top grade cordura and the inside is made of high density polystyrene, padded, with a velvet interior. It weighs just under 5lbs without horn and the dimensions are 19 X 16 X 10, which will fit under the seat of most airplanes. Does NOT fit YHR867.