Details & Upgrades Back Vertical Fence With Pickets – Alternating Sizes Gallery Material Design & Upgrades: Build Out 4 x 4 Treated Pine Posts2 x 4 Treated Pine Rails (x2)1 x 5.5 Western Red Cedar Pickets1 x 3.5 Western Red Cedar Pickets Durability Upgrades 2 x 4 Treated Pine Rails (x3)