Pro Tie GY4ULD100 4-Inch Gray Ultra Light Duty Color Cable Tie, Gray Nylon, 100-Pack Great for bundles of wire, loom, various other items and applications Tensile strength of 18-Pound Made from high strength and lightweight 6/6 nylon which is hygroscopic material, which absorbs and releases moisture and is non-toxic Bundle diameter of .75-Inch Working temperature range of-40 to 185-Degree F or-40 to 85-Degree C