Because of its immunity to electronic interference and its greater speeds over longer distances, fiber optic cabling has become the conduit of choice for high speed network communications. Monoprice is proud to offer a full line of high-quality Single-mode and Multi-mode duplex cables using optical fibers made by CorningÂ.This is a "Yellow" single-mode cable with a 9µm core and 125µm cladding diameter. The cable has color-coded Dual LC connectors on each end.The cable jacket is OFNR (Optical Fiber, Nonconductive, Riser) rated by ULÂ, which means that it complies with fire safety and insurance requirements and is safe for use within the walls, and between the floors, of commercial class buildings.