Distribution single mode fiber optic patch cord with 6 cores is buffered to the specified size of 0.9mm with LSZH material, and an Aramid yarn is used as a strength member to wrap the 0.9mm buffer layer. The external LSZH jacket is used to protect the internal structure. ensuring data transmission quality and providing good tensile performance and flame retardancy for the fiber optic patchcord. Fiber optic patchcord's low insertion loss ??0.3(dB) and high return loss ?? 35(dB) make sure the stability of transmission.