Rip-Tie Lite Plenum is fire retardant, and designed for use in raised floors, hung ceilings, and other air plenum spaces. This light duty cable management and organizational tool comes in a spool of 1,200 ties at .5" x 6" each, and in your choice of either black or cranberry color. Looking to tidy up your home entertainment setup, or perhaps reclaim some workspace in the office? Rip-Tie Lite Plenum is the right choice.