This 3 meter (~10 feet) fiber optic cable is terminated with a LC (Lucent Connector) connector on one end and a ST (Straight Tip/Bayonet Connector) connector on the other end. It is an OM1 multimode fiber (62.5 micron core) designed to transmit data across shorter distances at LAN speeds. The cord is duplex (two fibers) which means it permits synchronous communication between devices. The cladding diameter is 125 microns. Plenum cable is jacketed with a fire-retardant plastic jacket of either a low-smoke polyvinyl chloride (PVC) or a fluorinated ethylene polymer (FEP). Local building codes may require all cables run inside the walls or ceiling be Plenum rated