The PowerGRP GRP-81200 100-Count Resealable Pack of Type 21S AH-2 Black-Colored Heavy-Duty Cable Ties are 8” long, with 120lb of tensile strength for professional applications. They’re made from polyamide 6,6 nylon, resulting in a high mechanical strength and a wide temperature range (-40 F to 185 F). Fasten these 8” cables ties around a wide range of equipment with a bundle diameter between 0.28” (7mm) to 1.97” (50mm) using the bent tips and serrated locking mechanism to form an effortless and secure grip. Designed for cable management in industrial applications.