Regis Style #5131  Panels are screwless. Posts are 2 1/2" x 2 1/2" x .090" Wall - 8' Centers. Standard section racks 12" per 8' panel. Rails are 1 1/2" x 1 1/2" x .070"(top) x .095"(side). Pickets are 1" x 1" x .062" Wall. Picket spacing is 3.750". AAMA 2604 Powder Coating. Lifetime Warranty.