Luxilon M2 Plus 130 String Set Luxilon M2 Plus 130 is an all new string that uses multi-mono technology to provide the playability of a multifilament with the durability of a monofilament. This technology creates M2's variable flex for more comfort on soft hits and more control on hard hits. All of the benefits of a hybrid - now in one string. Gauge: 16 (1.30mm) Length: 40ft. (12m)