Features: 1) Loose tube style, gel-filled, layer-stranded 2) Optical fiber cable with metallic / not-metallic central strength member of steel wire/FRP 3) Filling compound and inner sheath. With aluminum tape protected cable core 4) Double-sided PE corrugated steel tape + PE outer sheath 5) Two-layer sheath for excellent, crush- resistant performance 6) Good mechanical and environmental performance and moisture-resistance Applications: 1) Suitable for direct buried, ducts and aerial 2) Long distance communication system 3) Subscriber network system