OM1 ST ST Duplex Fiber Optic Patch Cables, 62.5/125 Multimode jumpers. Each end pre-terminated with 2 stainless steel ST connectors. Our OM1 duplex jumpers have 62.5um Corning optical core and 125um cladding for high speed, low loss, data transmission. OFNR rated, orange colored, 3.0mm diameter, PVC jacket with zip-cord.