The Rico by DAddario Reserve Mouthpiece Patches are specially designed to protect your mouthpiece and are ideal for both clarinetists and saxophonists of all abilities and ages. The unique material adheres securely to the mouthpiece but can still be easily removed or transferred when and if required leaving no residue behind. The reserve mouthpiece patch is ideal for educational purposes it is effective in preventing teeth from sliding on the mouthpiece. It can be used as a tool to promote correct development of various aspects of embouchure and tone production especially how much mouthpiece to take and the prevention of biting. Each pack contains one sheet of 5 mouthpiece patches (0.80mm Thickness)