The PowerGRP GRP-361750 50-Count Resealable Pack of Type 21 Black-Colored Super Heavy-Duty Cable Ties are 36” long, with 175lb 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 36” cables ties around a wide range of equipment with a bundle diameter between .28” (7mm) and 10.35” (263mm) using the bent tips and serrated locking mechanism to form an effortless and secure grip. Designed for cable management in industrial applications.