Panduit® Dura-Ty® Cable Ties are weather-, chemical-, and UV-resistant for harsh outdoor power and communications applications. The durable locking mechanism, complete with double stainless steel locking barbs, provides a consistent, reliable connection and high-impact resistance and strength. Plus, the head and strapping are included for quick and easy installation. Extra-heavy cross section, 13.5"L (343mm), Tensile Strength: 1112, Bundles up to 3.9" (98mm), Black, 50pc. .. see full description