ProTie Extra 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-Degree F (-40 to 85-Degree C). Extra Heavy Duty cable ties are approximately.08-Inch thick and.35-Inch wide. Our UV Black cable ties are UV stabilized for outdoor use. Tensile Strength of 175-Pound.