The CN1 mounting arm features two 2” by 3” (51 x 76 mm) rectangular extrudedaluminum arms welded to the central pole adaptor. The mounting arm includes a cast-aluminum decorative curved section welded to the central pole adaptor and the arm. The luminaire adaptor will accept a luminaire equipped with Lumec’s four-bolt mounting system.The central pole adaptor slip-fits 12“ (305 mm) into a 4” (102 mm), 5” (127 mm) or 5 9/16” (141 mm) O.D. pole or tenon. > The CN1 is available with the OV option that can accommodate up to two 175W ballasts. > For pole supplied by others, we strongly recommend the OV option.