This is a Legere reed for B♭ clarinet. The thickness is 3.50. Purchased at Dolce Music. It's a new item, only tried out, but please refrain from purchasing if you are sensitive to such things. I bought it in April of this year, but it didn't suit me, so I'm selling it. The item itself will be wrapped in bubble wrap for shipping. Clarinet / clarinet / yamaha / Crampon / Legere / reed / Selmer / backun / Backun