Characteristics: 1. Protected by stainless tube, prevent high pull strengh, pressure, twist, bite by mice. 2. Gentle and has the same diameter of common patch cord, save the space. 3. No stress generated when outside force hit our armord optic fiber in order to ensure the stability of whole optic system. 4. Electric cable-like handling and easy to install, adapt to any harsh conditon. 5. Provide single mode, multi mode optic fiber for option. 6. 12 standard(IEC60304) PVC color to choose, blue, black, red, yellow, brown, pink, purple, white, grey, and so on.