This is a Silverstein Cryo4, 4th generation. It has some signs of use, with minor scratches, but is in good condition. I used it with a B♭ clarinet, but since it's size 7, it seems it can also be used with a small alto saxophone. Everything in the photos is included, and there is no box. If you need to adjust the string, you can use a 4mm hex wrench set sold at 100-yen shops, so you don't need to buy a special one. Please check my profile before purchasing.