Materia:Nylon 66,94V-2,certified by UL,Heating-resisting,erosion control,insulate well and not apt to age. Materia:Nylon 66,94V-2,certified by UL,Heating-resisting,erosion control,insulate well and not apt to age. Operating temperature:-40°C to 85°C Color:Natural (or white,standard color),UV black and other colors are available on request.