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 TiesVelcro Ties Made with an easy slide slick burr free surface Light-weight Flush Mount cULus Listed - Complies with 2043 Plenum Rated RoHS TIA Compliant Ultimate static load is 50 lbs for each size Application Perfect for the cabling industry shop and home Telcom Voice Network Data Broadband Satellite CCTV Fiber Flexible conduit