Panduit DT8EH-Q0 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. Extra-Heavy Cross Section, 27.0” (686MM) Length, Are Made Of Weather Resistant Acetal. They Are Black In Color and Come In Packages Of 25.