The LC-LC Duplex Singlemode 9/125 Fiber Optic Cable is the ideal solution for connecting patch panels and network devices that utilize LC to LC style connectors and require 9/125 Single mode cabling. Each cable is 100% tested . The 1/2 markers on each end of the assembly make it easy to identify the TX and RX connector, ensuring a hassle-free installation process. Upgrade your cabling with this reliable and high-performing fiber optic cable.