The JBX00044 ST/UPC OS2 Singlemode Fiber Pigtail represents a reliable solution for professionals requiring high-quality optical fiber connectivity. This 3-meter simplex pigtail combines superior optical characteristics with robust physical construction, making it ideal for telecommunications infrastructure, data center interconnections, and enterprise network installations. **Key Technical Specifications:** Built with G.657.A1 glass fiber featuring a 9/125 micron singlemode core, this pigtail delivers exceptional performance metrics. The insertion loss rating of ≤0.35dB with typical performance of 0.15dB ensures minimal signal degradation over the connection. Return loss specifications of ≥20dB provide superior signal integrity. Attenuation performance meets ANSI/TIA/EIA-455-171-A-2001 standards, with ratings of 0.25dB/km at 1310nm or 0.35dB/km at 1550nm wavelengths. **Physical Characteristics:** The 0.9mm tight-buffered (900µm) jacket provides excellent durability and flexibility for installation in constrained spaces. The yellow coloring enhances visibility during installation, maintenance, and troubleshooting procedures. The simplex configuration contains a single fiber strand, reducing bulk while maintaining full bidirectional communication capability when integrated with appropriate equipment. **Compliance and Certification:** Fully RoHS and ELV compliant per EU Directive 2002/95/EC, this pigtail meets stringent environmental and safety standards. TAA compliance ensures compatibility with government and regulated enterprise procurement requirements. Manufactured in Taiwan, the United States, or China, with quality assurance throughout the production process. **Practical Applications:** Perfect for telecommunications equipment termination, laser module connections, test equipment interfaces, and fiber optic network expansion. The unterminated ST/UPC connector requires proper termination or connection to compatible equipment, offering flexibility for custom installations. **Additional Benefits:** Custom lengths available for specific application requirements. Shipped from multiple U.S. locations (Danville CA, Fort Worth TX, Beaufort SC) for faster delivery. Qualifying orders enjoy free standard shipping on orders exceeding $99. Comprehensive 90-day limited warranty provides peace of mind for critical network deployments. Whether upgrading legacy systems or building new fiber optic infrastructure, the JBX00044 delivers reliable, standards-compliant performance for demanding telecommunications applications.