Copper: Annealed Electrolytic Plain / Tinned Copper Conductor with Various Diameter of 0.4mm to 0.9 Mm as per Iec28 and Astm B3.insulation: Conductor Insulation are Solid Hdpe / Pvc Insulation.cable Core: Two Insulated Conductors are Twisted Together to Form a Pair with Uniform Specific Lay Length .cable is Assembled By Stranding of 10 Pairs / 20pairs or 25 Pairs Basic Subunit.core Wrapping: a Non Hygroscopic and Dielectric Polyester Film is Applied Helically Over the Cable Core.sheath: Pvc / Frls Pvc / Pe Sheath in Grey / White / Green / Black Colour is Extruded Over the Cable Core.