The JBX88220 0.5m ST/ST duplex singlemode fiber patch cable represents a premium solution for connecting fiber optic network equipment with precision and reliability. This cable is engineered to meet the demanding requirements of telecommunications professionals, data centers, and enterprise network administrators. **Technical Specifications:** Featuring a 9/125 singlemode core with G.657.A1 glass fiber, this cable provides exceptional attenuation performance: 0.25 dB/km at 1310 nm and 0.35 dB/km at 1550 nm. The duplex configuration enables simultaneous transmission and reception of fiber signals. With insertion loss of ≤0.35dB (typical 0.15dB) and return loss of ≥20dB, this cable exceeds industry performance standards set by ANSI/TIA/EIA-455-171-A-2001. **Design & Construction:** The 1.8mm outside diameter provides flexibility for routing through tight spaces while maintaining durability. The OFNR (Optical Fiber Non-conductive Riser Rated) jacket offers fire resistance suitable for building installations without conduit. The distinctive red coloring aids in quick identification within complex network environments. **Compliance & Standards:** TAA compliant for government procurement, this cable meets RoHS/ELV directives (EU 2002/95/EC), making it suitable for environmentally-conscious organizations. The standard Type A to B crossover polarity configuration works seamlessly with most duplex patch cord applications. **Flexibility & Support:** While this product ships at 0.5m, custom lengths are available for specialized installations. With free standard shipping on orders exceeding $99 and convenient shipping locations across the US (Danville CA, Fort Worth TX, Beaufort SC), procurement is streamlined. The 90-day limited warranty provides peace of mind for your critical network infrastructure investment.