Keep long-distance fiber links stable with a cable built for backbone transport, patching, and equipment-room interconnects. This Monoprice single-mode duplex cable uses a 9/125 µm fiber profile to support the narrow light path required for extended runs and lower attenuation than multimode alternatives. SC on one end and ST on the other makes it practical for environments where legacy hardware and current network gear must coexist. The duplex construction supports paired transmit and receive paths in a single assembly, reducing cable clutter and simplifying routing in racks, closets, and riser pathways. The 3 mm yellow jacket makes identification straightforward at a glance, while the OFNR rating supports use in riser applications. For teams standardizing fiber infrastructure, this cable offers the right combination of connector compatibility, single-mode performance, and installation discipline without overbuying on features you do not need.