The High Performance J-Hooks are built with steel J-Hooks over-molded with polypropylene for an easy cable slide. The �Snap-Lock� Retainer is easy to use and re-use, firmly securing cables every time and eliminating the use of cable and Velcro ties. Each J-hook has a 2� wide base support, to prevent cable kinks. They�re cULus listed, Plenum rated, RoHS compliant, and are available in 1�, 2�, 3�, and 4� sizes, along with a variety of hardware accessories for all of your cable management needs. Wide base support � 2� Snap-Lock Retainer firmly secures cables Eliminates the use of Cable Ties/Velcro Ties Made with an easy slide, slick, burr free surface Light-weight Flush Mount cULus Listed - Complies with 2043 Plenum Rated RoHS & TIA Compliant