* B6 anti-microbending optical fiber can be used to ensure network transmission. * Simple structure, light weight and strong practicability. * Two parallel phosphating steel wire reinforcements have good tensile and compressive properties to protect the optical fiber. * Groove design, easy to peel off, convenient to connect, simplify construction and maintenance. * Low-smoke, halogen-free, flame-retardant sheath, safe and environmentally friendly.