Heavy-duty 24" black zip ties engineered for demanding applications. This 300-piece pack features industrial-strength nylon 66 construction with 250 LBS tensile strength and 12mm width for superior holding power. UV-resistant and temperature-rated from -35°C to 85°C, these ties withstand harsh outdoor conditions without degradation. Fireproof material resists aging, acid, and corrosion. The curved tail design enables quick, smooth fastening with minimal effort. Ideal for HVAC applications, industrial projects, outdoor installations, and heavy-load bundling tasks.