Heavy-duty zip ties are hard-wearing and designed for rugged industrial automotive and farm/ag applications demanding high levels of tensile strength and large bundle diameters. Permanently secured until you cut them off GB ties lock tight without stretching or sliding. The thick nylon 6/6 material and patented one-piece injection-molded construction eliminates failure due to parts working loose or breaking off. Raised ridges on the cable ties bent tips are designed to provide a secure grip while requiring minimal effort to close and the strong locking head ensures the increased tensile strength you need. Ideal for ducts temporary fencing heavy equipment and vibration prone areas in both electric and non-electric applications including home repairs remodeling kitchen or bathroom renovations in residential and commercial locations. When you ve got a big job that demands a strong tie able to handle a large bundle diameter then count on Gardner Bender heavy-duty cable ties. UL Recognized component. Ultraviolet black UVB ties resist harmful light rays - primarily for outdoor use. These 30-Inch Heavy Duty Black UV Resistant Cable Ties feature self-extinguishing fungus-inert 6/6 nylon which remains serviceable through a temperature range of -40-degrees to +185-degrees Farenheit -56-degrees to +85-degrees Celsius. Gardner Bender is an industry-leading manufacturer of professional electricians tools and supplies. Since the beginning our goal has been to exceed customer expectations by offering an unmatched combination of service delivery and product. With that goal in mind our commitment continues with the introduction of innovative products product line expansion and capability expansions.