Add To Cart available Quick view Quick view Add Compare OS2 ST ST Plenum Duplex Fiber Patch Cable 9/125... Price $24.19 OS2 ST/ST Plenum Duplex Fiber Patch Cable 9/125 Single Mode OFNP. Plenum Rated, Self Extinguishing, yellow, 3.0mm diameter jacket. Corning SMF 9/125um fiber core/cladding, 2.5mm ST to ST terminated duplex fiber optic patch cable.