The all-new M/O ligature series combines beauty, efficiency and function in one simple, yet effective design. The M/O series combines the light weight and elegant design of the original Masters series with the symmetrical tightening and speed of the Optimum series, resulting in a beautiful ligature that works beautifully. That’s Vandoren’s M/O. Ligature features top-mounted symmetrically tightening screw with a choice of finish. Comes with plastic cap.