Corning glass-yarn armored loose tube cables are designed for outdoor use for campus, city and intercity backbones in duct installations. The loose -tube cable construction, by isolating the fibres from installations and environmental rigors, provides stable and highly reliable transmission parameters. The 2.0 mm buffer tubes and fibers in each tube are color -coded for quick and easy identification. The SZ -stranded construction further reduces installation and environmental influences on the transmission parameters and allows mid -span access. These slim and lightweight cables are designed with a 1.1mm HDPE outher jacket for easy installation in conduits and ducts.