This is a Vandoren clarinet reed. The product number is Alto MiB-E♭ 3. I don't quite understand what it means. It's new. Unopened. It has been in stock for a long time. I inspected it. There are no changes or abnormalities due to the passage of time. I opened and checked other stock. I am not an expert, so please check the contents written on the box that I have photographed for more details.