Vandoren LC07M Optimum Alto Sax Gold -Gilded Ligature and Cap The reed remains exactly in place. Neither reed nor Ligature are compressed at the sides. unique vented cap allows reeds to dry quickly. 3 interchangeable pressure plates adjust to the sound, style, and musical piece you're performing. The collar around the Mouthpiece remains independent of the area in contact with the reed, allowing the vibrations of the reed to develop without interference.