This range of multipair internal telephone cables are manufactured in accordance with BT type CW1308. They are constructed from 0.5mm tinned copper conductor, which is PVC insulated, these cores are twisted into pairs and the required number of pairs are then laid up in either layers for cables containing up to and including 25 pairs, or in units for items of 32 pairs and above, the pairs are colour coded for ease of identification. An earth conductor of 1.38mm PVC insulated plain copper is included where shown. The majority of cables are available in either white or black PVC.