Material Specification: Natural Nylon: Cable ties made from U.L. approved nylon 6/6. Normal service temperature range: -40 °Cto 85°C. Flameresistant rating: UL 94V-2. Black Nylon: (Material and temperature as above) Except in black color. Weather Resistant Nylon(ULTRA VIOLET): Carbonate "A" was added for greater resistance to ultra violet light in outdoor application.