GC/AAA Fences Cedar Board Privacy with Accent Top panels are made with 1" x 4" white cedar boards or 1" x 5" Tongue & Groove boards, fastened with aluminum ring shanked nails to 2" x 3" or 2" x 4" white cedar square or moulded doweled back rails. The topper options include square and diagonal lattice, baluster, and grid. There are different post options available from the basic bevel top cedar or pressure treated to 5x5 or 6x6 cedar or pressure treated with post caps. Custom tapered panels offer a smooth transition from high to low.