These cables are made of a structure termed GYTY, in which these optical fibers are housed in loose tubes filled with a gel, which is water-blocking, and stranded around a central strength member. Finally, the outer polyethylene (PE) layer offers mechanical protection. Through GYTY fiber optic cable, primarily intended for outdoor application, telecommunication operators can transmit optical signals over long distances. It consists of colored optical fibers coated with a high-modulus loose tube filled with thixotropic. In the past 20 years, GL FIBER has been providing high quality optical fiber & cables products to telecom Operators, Contractors, ISPs, Trade importers, Resellers, Engineering Firms, OEM customers and various communication projects in more than 190 countries worldwide. Check optical fibre cable. GYHTY-8~12Xn Optic Cable is Loose Tube Layer Stranded Non-metallic Reinforced Core Optical Cable GYHTY-8~12Xn Optic Cable is a high-performance, robust solution designed for demanding communication applications. The tubes are filled with a water-resistant filling compound. A metallic or Fiber Reinforced Plastic (FRP) locates in the center of core as a strength member.