Yamaha has a wide array of accessories for the needs of every musician.  This is a standard Yamaha Baritone Saxophone ligature, model # YAC-1617, which is designed to be durable, and produce a quality sound.  Typically used in conjuction with the Yamaha 5c Baritone Saxophone mouthpiece.  This ligature will fit most standard baritone saxophone mouthpieces.