Product Description Category: large number of cables Product Name: 50 pairs of large number of cables Category: Large number of cables are generally divided into three categories of large number of large number of classes and 5, is divided into: 25 50 75 100 200 300 pairs. Unshielded and shielded Type: HYV 50 * 2 * 0.5 Structure: ※ Conductor: Copper ※ diameter: diameter 0.45,0.5mm ※ Insulation: High-density polyethylene HDPE, ROHS ※ sheath: Polyvinyl chloride PVC, low smoke Halogen-free, environmentally friendly, flame retardant ※ Length: 305 meters generally use / axis, 500 m / axis the core surface with a non-hygroscopic or non-woven polyester tape wrapped together after tidal metal shielding tape longitudinally. Chromatography: standard chromatographic main color: white, red, black, yellow, purple secondary color: blue, orange, green, brown, gray. 25 pairs of a basic unit, the basic unit of each sub-unit of the same color tie, tie color for each basic unit of arrangement at full chromatographic requirements. :( Shield shielded) drain wire + aluminum foil wrap or aluminum foil + braid longitudinally performance: compliance with EN50173-1 and ISO 11801: 2002 requirements. Adopt IEC international standards and YD / T1019-2001 industry standards, similar products meet international standards. Quality Certification: ISO-9001 / ROHS transmission frequency: 100MHz, and supports duplex application execution standards: YD / T1019-2001, Q / AXD-H-001 2002 Purpose: General large number of cables used in weak engineering do voice trunk for voice systems. Three telecommunications backbone cabling.