The Rico by DAddario Reserve Mouthpiece Patches are specially designed to protect your mouthpiece and are ideal for both clarinettists 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 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. It is also effective in stopping teeth from sliding around on the mouthpiece. Each pack contains one sheet of five mouthpiece patches each of 0.35mm thickness. Please note: Image is for reference only mouthpiece is not included with this product. Specifications Number of patches: 5 Thickness: 0.35mm