Maintain stable single-mode connectivity across rack-to-rack and row-to-row paths with this 20 m OS1 duplex patch cable from Black Box. Built with LC connectors on both ends, it supports compact, high-density fiber terminations where space and routing precision matter. The yellow jacket makes the cable easy to identify during installation, moves, and troubleshooting, helping teams preserve order in crowded panels and enclosures. This cable is suited for environments that need dependable optical interconnects without unnecessary complexity. The duplex format supports paired transmit and receive paths in a single assembly, reducing patching clutter and simplifying documentation. At 20 m, it gives infrastructure teams enough reach for structured routing while avoiding excess slack that can compromise airflow and cable discipline. Because this item is non-cancelable and non-returnable, it fits planned deployments where the exact length and connector type are already specified. That makes it a practical choice for procurement workflows that demand consistency across standardized fiber builds.