CENTRAL LOOSE TUBE RIBBON FIBER CABLE can provide excellent transmission performance and protection of fibers in a variety of field environments. It is usually used in long haul communication system, subscriber network system, distribution, feeder network system and local area network system. Understanding the differences between central core ribbon and loose tube fiber cables is crucial for making the right choice for your project. Built with 250 µm fibers (2–24 count), they're offered in plenum, riser, indoor/outdoor-LSZH and outside plant (OSP) ratings. Armor options include all-dielectric, aluminum.