Cable ties are made with type 6/6 nylon for high impact and tensile strength. They are self extinguishing -UL 94 Flam. Class V2 and non-corrosive. Operating temperature from -40 °F to 185 °F (-40 °C to 80 °C). Heat stabilized from -40 °F to 221 °F (-40 °C to 105 °C).