Pro Tie Heavy Duty cable ties are made from high strength and lightweight 6/6 nylon. Nylon 6/6 is a hygroscopic material, which absorbs and releases moisture, is non-toxic and has a working temperature range of –40 to 185° F (-40 to 85° C). Heavy Duty cable ties are approximately .08" thick and .30" wide. Pro Tie UV Black cable ties are UV.