Bare copper according to ASTM B3, Insulation : PVC, Polyvinylchloride., Colour : As per customer order., Single core, Temperature Range : 40°C to +85°C (3000 Hours), Voltage Rating : 60 Volts, Specification :SAE J-1128, GPT : General Purpose thermoplastic insulation, Type GPT wire is available in solid colors and stripes with optional custom printing and / or numbering