Laser optimized for reliability and blazingly fast 10 Gbps performance, 4XEM's Multimode 50/125um Duplex Fiber Patch Cables provide almost three times the bandwidth of 62.5um multimode fiber. Each end sports high quality, pull proof LC connectors with 1.25mm zirconia ferrules. Wrapped in a durable PVC jacket, every cable is tested for insertion loss before shipment and inspected to ensure GR-326 requirements are met. Lifetime warranty.Problem it solves: A fast, dependable and high quality fiber optic cable option. Ideal for fiber runs between switches, hubs, routers and other high end networking gear.4XEM gear is respected industry wide for its high performance, premium quality and durability.