Uni-tube non-metallic air-blowing micro cable is a 250μm single-mode or multi-mode optical fiber sheathed in a loose tube made of high modulus material. The tube is filled with non-toxic and harmless waterproof compounds, and the loose tube is stranded with non-metallic reinforcement elements such as aramid. Then a black or colored high-density polyethylene (HDPE) sheath is extruded to form a cable.
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