This is a case cover for the clarinet world. I've actually tried putting a Yamaha/Buffet Crampon pochette case in it, so it works. Therefore, I think it can be used for most manufacturers' cases. The case cover part has cushioning material for peace of mind, and the bag part can hold sheet music in a binder, as well as other accessories. There are also multiple pockets for organizing small items, which is convenient. In addition to carrying it by hand, you can also use it as a backpack by taking out the stowable shoulder straps. The backpack shoulder straps are cushioned, so you can carry it without feeling the weight too much. Although it is not included, there are D-rings for attaching a shoulder strap, so it can be used in a 3-way configuration. It is generally in good condition, but the cushion on the shoulder strap has some color fading.