Tripp Lite's 15-meter ( 50ft ) multimode duplex fiber optic SC/ST patch cable is manufactured from 62.5/125 zipcord fiber. The cable has ST to SC connectors, a PVC jacket and is FDDI and OFNR rated. Duplex multimode fiber is most commonly used in LAN applications. Manufactured from 62.5/125 duplex (zipcord) fiber PVC jacket Length: 15-meters( 50ft) Connectors: 2 ST to 2 SC connectors Insertion loss testing performed on every connector (0.2db typical) and provided with cable Beveled edge on ends of glass makes insertion of plug a breeze Fiber made from glass (not a polymer) Color coded shrouds identify transmit and receive Fiber optic distributed data interface (FDDI) rated OFNR (riser rated)