Grainger carries single mode and multimode fiber optic cable. Use multimode cable for most general bi-directional fiber optic applications such as installing and extending desktop network connections. Find multimode duplex cable here in two core sizes, 50 micron or 62.5 micron. Use single mode cable, with tight buffer that helps protect the individual fibers, for long-haul use over greater distances. Whatever your fiber optic cable needs may be, make Grainger your one-stop supply source!