The PowerGRP GRP-5180X 1000-Count Bulk Resealable Pack of Type 21 Black-Colored General-Purpose Cable Ties are 5†long, with 18lb 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 5†cables ties around a wide range of equipment with a bundle diameter between .06†(1.5mm) and 1.3†(33mm), using the bent tips and serrated locking mechanism to form an effortless and secure grip. Designed for cable management in industrial applications.