This is a metal Berg Larsen 120-2-CF Tenor Saxophone mouthpiece. It has been refaced by Doc Tenney, opening the tip up and giving it a darker tone. It plays fantastically in all ranges of the saxophone, even altissimo, and is great for a Blues player. In regards to Doc Tenney, the CF stands for Custom Facing and the 2 is the chamber size, giving it a nice mid-sized baffle. Get this great jazz piece before it’s gone!