ST to SC 9/125 Micron Duplex 3 mm Jacketed Cable Patch Cord, 1 Meter, Pass all TIA/EIA-568-B.3 performance requirements, 100 percent factory inspected end face geometry in compliance with Telcordia GR-326-CORE, Issue 3, UPC polished, factory terminated and 100 percent tested for insertion loss and return loss, insertion loss and return loss data recorded for every singlemode patch cord, Lifetime traceability of test data to a Quality Control number on each patch cord, highest quality flame retardant fiber optic cable with tight-buffered coating on each optical fiber.