Pro Tie B17EHD50 17-Inch Extra Heavy Duty Standard Cable Tie, UV Black Nylon, 50-Pack Great for bundles of wire, loom, various other items and applications Tensile strength of 175-Pound and a bundle diameter of 4.9-Inch Made from high strength and lightweight 6/6 nylon which is hygroscopic material, which absorbs and releases moisture and is non-toxic UV black cable ties are UV stabilized for outdoor use Working temperature range of-40 to 185-Degree F or-40 to 85-Degree C