The JBX42523 ST/APC to ST/APC duplex singlemode fiber patch cable represents a premium solution for professionals requiring reliable fiber optic connectivity. Engineered to exacting standards, this 12-meter cable combines performance, durability, and compliance in a single product. **Technical Excellence:** This singlemode cable features a 9/125 micron core with G.657.A1 glass fiber construction, delivering optimal performance for long-distance signal transmission. The insertion loss specification of ≤0.35dB (typical 0.15dB) at both 1310nm and 1550nm wavelengths ensures minimal signal degradation. Return loss of ≥20dB provides superior signal quality and system reliability. Independent attenuation testing adheres to ANSI/TIA/EIA-455-171-A-2001 standards, guaranteeing consistent performance. **Build Quality & Safety:** The 1.8mm outer diameter cable features OFNR riser-rated jacketing, meeting stringent fire safety requirements for in-building deployment. The yellow jacket aids in identification and organization within complex network installations. With dimensions of 5.0" x 5.0" x 0.2", the compact packaging ensures space-efficient storage and deployment. **Compliance & Warranty:** Fully TAA compliant for government and enterprise procurement. RoHS/ELV certified for environmental responsibility. Manufactured in Taiwan, United States, or China with quality controls ensuring consistency. The 90-day limited warranty protects your investment. **Applications:** Ideal for telecommunications infrastructure, data center connectivity, high-speed network backbones, and any application requiring duplex singlemode fiber transmission. Type A to B crossover polarity configuration suits standard duplex patch cord requirements. **Custom Availability:** Available in custom lengths for specialized installations. Ships free on orders over $99 from multiple U.S. locations for rapid delivery.