Annealed bare/tinned high conductivity copper. PVC/PE/Cellular PE insulated. Insulated cores twisted to form a pair. Pairs laidup in sub-units/units in concentric layers. Taped. Overall PVC sheathed. Individual and or overall shielding with Aluminium-Mylar tape/copper tape/lapping/braiding provided depending upon the requirement. Armouring provided with an extruded inner PVC/PE sheath and overall sheath of PVC/PE wherever required.