Ever curious as to what the difference is between CAT6 plenum vs riser (standard) cable? We may be able to help. The basic explanation is that Plenum rated CAT6 is required in most installations where the cable will be used in plenum spaces (spaces such as air ducts, elevator shafts or some raised ceilings). CAT6 plenum cable while not truly resistant to fire does not emit the same amount of toxic fumes when burning. We offer bulk cat6 plenum cable in a variety of common colors. We also carry bulk 1000 ft cat6 plenum shielded should you need protection from EMI (electro magnetic interference) as well.