Otto Link alto saxophone rubber mouthpiece. The tip opening is a 6, and it's a classic jazz mouthpiece. I bought it used and enjoyed using it for a while because of its dark and full tone. It's an old one, so it has a sulfur smell. I got used to it as I used it. Also, there are some discoloration and scratches, so please check the photos. There is no box, so I will wrap it in cushioning material for shipping. Please understand that this is a used item and purchase it with no returns or exchanges.