The Ultimate Ligature is more than just a trendy accessory, it has been conceived as an instrument in its own right. For more than 25 years Francois Louis has been working with great musicians such as Joe Lovano, Bob Berg, Tim Ries, David Sanchez, Chris Potter, Gary Keller, Jason Seizer, Emanuele Cisi, Jorge Pardo and many others musicans. The unique design of the Smart Cap nicely reveals the whole mouthpiece line. The Ultimate for alto saxophone is available in 3 sizes : - XL : For regular hard rubber alto mouthpieces like Selmer, Vandoren, Meyer, Otto Link etc... - S : For metal alto mouthpieces like Otto Link, Dukoff, Berg Larsen, Ponzol etc...