Code Restrictions: OK for use with all (Non-Fire) power limited circuits except those in risers and plenums. Features:Available in 500ft or 1000ft Tangle-Free Boxes or Spools. Sequential Footage Markings. Construction: Copper Conductors, Genelene Insulation, Conductors arranged in pairs, Flexible Polyvinyl-Chloride Jackets. Standard Jacket color: Gray.