VANDOREN LC57PGP M/O ROSE GOLD PLATED LIGATURE ALTO WITH PLASTIC CAPThe 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 Two small contact points only on the reed with an inverted tightening Thus, the M O ligature allows an optimum vibration of the reed and a crisp articulation.