GYFXTBY is a flat oval, all-dielectric drop cable commonly used in FTTH (Fiber to the Home) networks. Its name describes its key physical trait: it's a flat cable designed to be unobtrusive when routed along walls or through tight spaces. It is made of multiple ( 1 – 12 cores ) 250 μm colored optical fibers ( single mode or multi-mode fibers ) embedded in the internally filled waterproof compound loose tube made of high-modulus plastic, a non-metallic tensile element ( FRP ) is placed on both sides of the loose tube, and a rip cord is placed on its outer layer, and then the high-density polyethylene is extruded to form an HDPE sheath.