JT&T Products; Bonded Parallel Trailer Wire is designed especially for RVs, and boat utility trailers. Bonded to form parallel multi-conductor cables. All copper strand core within general purpose thermoplastic (GPT) insulation The thermoplastic insulation operates satisfactorily between extreme temperature. Temperature rating of 80°C (176°F). Rated at 600Volts. Normal cold temperature rating of -30°C (-22°F). Meets or exceeds S.A.E. J1128 specifications. Trailer Wire is resistant to grease, oil and acids. JT&T Products also offers a complete assortment of primary wire. Made in the USA.