The Rip-Tie Lite Plenum is compliant with standards for allowed use above hung ceilings or below raised floors in wire and cable management applications. It is manufactured with a polypropylene hook and nylon loop, and is fire retardant. Get 50 re-fastenings out of this Rip-Tie products. Comes in a spool of 900 ties, which measure at .5" x 8" each. Choose between cranberry and black color options.