4 Core Single Mode LC Industrial Armored TPU Fiber Optic Patch Cable: Industrial TPU Jacket features strong tensile strength, high abrasion resistance, water proof, high and low-temperature resistance, uv-resistant, bending resistant. Suitable for Various Harsh Installation Environments such as. The singlemode fiber patch cable meets RoHS compliant, and all cables are 100% optically tested for insertion loss before shipment, this is very costs effective for your network. 4 core single mode armored fiber optic cable What is 4 core fiber optic cable? just as the name implies,4core is 4 fibers cover in the cable tube. Designed for industrial, outdoor, and direct burial applications with high durability and stable performance.