Ideal for contractors with limited storage facilities, this conically shaped enclosure nests to achieve reduced inventory space requirements and transportation costs. Furnished with four combination conduit knockouts 1⁄2" – 3⁄4" (13-19mm), four J-clips and two flexible perforated mounting straps. One-piece CRS construction, undercoated, patch-jute lined, and finished in epoxy. UL Plenum 2043 rated.