This 20m Multimode Duplex OM4 Fiber Optic Patch Cable (50/125) - LC to LC has ceramic ferrules and a 50/125 micron core, this cable is suitable for extremely high speed data transmissions such that you would find in 100 Gigabit Ethernet (10 Gb/s) networks. This 100 Gig fiber is OM4 Laser-Optimized.