OS2 LC LC Armored Fiber Patch Cables | Duplex LC to LC Singlemode 9/125 jumper cord. Terminated with small form factor (SFF) ceramic ferrule LC-LC patch connectors with lc duplex clips included. A single-mode, indoor rated, fiber patch cable for durable, reliable and fast data transmission. Inside the crush resistant armor wrap is an LSZH, yellow, 2.0mm outer diameter, jumper with zip-cord.