BT Specification 19808R PVC Phone Line Wire with Solid Copper Conductors is ideal for wiring telephones, low current and low voltage applications in Domestic and Commercial enviroments. Commonly used as a Telephone Extension Cable. A quality, well constructed product which is easily stripped and worked with. 0.5mm² copper conductor size, External diameter 4.5mm (Should be used with 4mm or 5mm Round White Clips) 4 Core cable (2 Pair) with Industry standard colour coding - Orange, Orange/White, Blue & Blue/White coloured cores as indicators Plain annealed high quality solid tinned annealed copper conductors (to BT specification) both Insulated and Sheathed with PVC. Suitable for extra low (such as CCTV Supply) and low voltages up to a maximum of 80v Suitable for temperatures between 0°C and +70°C General purpose PVC telephone cable suitable for use in internal Telephone Systems, other communication equipment as well as low voltage and low current applicati