Vandoren Alto Saxophone Pink Gold M/O LigatureThe new M O ligature combines the lightweight construction of the legendary Masters ligature with the highly efficient tightening of the OPTIMUM ligature. Lightweight. Easy to set up. Quick and symmetrical tightening with a unique double track screw mechanism. Inverted tightening with only 2 small contact points on the reed. Thus, the M O ligature allows an optimum vibration of the reed and a crisp articulation.