The AC4 / AC6 / AC8 mounting arms feature a tapered spun aluminum arm of 4” by 2 7/8” (102 by 73 mm) to 2 3/8” (60 mm) O.D. at the luminaire end, mechanically assembled to the central housing. The mounting arms include a decorative curved flat piece of aluminum, mechanically assembled to the central pole adaptor and to the arm using stainless steel. hardware. The central pole adaptor is complete with a cast-aluminum cap, slip-fits 9“ (229 mm) over a 4” (102 mm), 5” (127 mm) or 5 9/16” (141 mm) O.D. pole or tenon.