Tripp Lite's 6-ft. multimode duplex fiber optic MTRJ/ST patch cable is manufactured from 62.5/125 zipcord fiber. The cable has MTRJ to ST connectors, a PVC jacket and is FDDI and OFNR rated. Duplex multimode fiber is most commonly used in LAN applications. Tripp Lite warrants this product to be free from defects in materials and workmanship for life.