US Cable Ties clamp head cable ties are designed with a contoured head for optimal surface contact and complete circumferential compression with the material. This optimal surface contact is especially important with soft hoses as the tie can be used as a type of hose clamp for very low pressure applications. Clamp head ties are made from impact modified high strength and lightweight premium 6/6 nylon. Natural ties are not rated for UV exposure and therefore are not suggested for outdoor usage. Operating temperature is -40 to 185°F (-40 to 85°C). AH-2 plenum rated and UL94-V2 flammability rating. ISO 9001 and RoHS Compliant. Made in USA!