Luxilon M2 Plus 16L StringsThe new Luxilon M2 Plus 16L string has all the advantages of a multifilament and monofilament combined into one string. It`s the first string with variable flex - for more control on hard shots and more comfort on soft shots for added playability. Composition: Co-Polyester Monofilament Color: Pearl Gauge:16L (1.25mm) Length: 40 ft For more information on Choosing the Right String or Choosing a Tennis Racquet, check out our Tennis Express Buyer`s Guide. View our other Brands of Strings.