Duplex & Simplex Optical Fiber Cable Features 1.Optical fiber follows ITU spec. Color codes:Yellow(SM);Orange(MM). Meet UL(OFNR and OFNP) flame retardant rating. 2.PVC,LSZH,Plenum and Hytrel outer sheath. Quality Assurance System 1.Optical testing follows ITU,IEC and EIA/TIA-FOTP. 2.Quality approved by UL. Application The duplex tight buffer cable can be directly assembled with connectors as pigtail or patch cord. Muluiple simplex tight buffer fibers can be bundled as the fan-out or breakout cable for indoor wiring.