Vandoren alto saxophone reeds, 10 reeds per box, MIB - Eb model. These are very rare. I purchased them for 5,500 yen per box. Regarding reed thickness for saxophones: - Beginners typically use "2 1/2" - As you improve, you move to "3 1/2" ...or so it goes. After much trial and error, I've found that thinner reeds produce a better sound quality. Moreover, you can use all the reeds in the box. It's economical and environmentally friendly, making it a great deal. Thank you for looking.