Choose between lightweight aluminum panels that are easily machined or durable steel panels. Contractor and Shop Packs are also available, providing a cost effective, space-efficient way to stock the panels you use most frequently. Panels in Contractor packs are individually poly-bagged for protection. Choice of flanged, flat or hinged styles Steel or Aluminum construction Sizes from 1/3 RU up to 6 RU panels Choice of flat black powder coat, textured black powder coat, black wrinkle powder coat or black brushed and anodized Order a single panel or a shop pack of 50 panels.