This is a single case that can also be used as a backpack. It has a side pocket on the back, making it possible to carry A4-size sheet music, etc. The metal fittings of the zipper have some paint chipping due to use. As shown in the fifth photo, there is a slight fuzziness on the surface in one place. I purchased it used in 2020, so there is some wear and tear, but it is in a clean condition. I haven't used it much, and I've kept it stored in my room. Single case Trumpet Trumpet case