Universal (Indoor/Outdoor) dry core optical fiber Multi Loose Tube cable with aramid yarns as strength member and Low Smoke Zero Halogen outer jacket. Existing out of 12 tubes with a diameter of 2. 5mm with 288 fibers (12t x 24f) MM OM2. Corning ALTOS® all-dielectric gel-free cables are designed for outdoor and limited indoor use for backbones in lashed aerial and duct installations. The loose tube gel-free design is fully waterblocked using craft-friendly, water-swellable materials, which means cable access is simple and no clean. s including Plenum, Riser and LSZH in all diameters. These are used to provide links to prUniversal OFC MLT: ARAMID + LSZH with 12 Tubes of Ø2. Ideal for long-distance, high-speed data transmission.