OM4 ST ST 40/100G Plenum 50/125 Multimode Duplex Fiber Patch Cables. OFNP multimode fiber jumper assembly with self-extinguishing, flame retardant, UV resistant, plenum rated, aqua jacket. At the center, a Corning 50/125um fiber core, zip-cord reinforced patch cable, terminated with stainless steel ferrule ST connectors.