Southwire 56917945 500-Feet 24-Gauge 4 Pair CMR UL 75-Degree C Low Smoke PVC Jacket Category 5e Riser Cable, Gray 500-foot Pull Box 24 AWG/ 4 pairs Gray Jacket Solid Annealed Copper Conductors Thermoplastic insulation Low smoke PVC jacket May be used in the place of CMR, CMG, CM, CMX cables May be run in plenums