Vandoren M/O Series ligatures combine the lightweight construction of the legendary Masters Series ligature with the highly efficient tightening of the OPTIMUM Series ligature. Thus, the M/O ligature allows an optimum vibration of the reed for crisp articulation. M/O Series Saxopone Ligatures are available for soprano, alto, tenor and baritone saxophones in gold, and aged gold. Alto and tenor sax ligatures are also available gold-plated. Lightweight Easy to set up Quick and symmetrical tightening with a unique double-track screw mechanism Two small contact points only on the reed with an inverted tightening