Abw44z, Adjustable Post Base, Features 1 Stand Off Height Above Concrete Floors, Reduces The Potential For Decay At Post Column Ends, Increased Capacity To Resist Uplift Loads, Nominal Post Size 4 x 4, Made From 16 Gauge Steel, Zmax Galvanization Offers Extra Corrosion Resistance, Install With 12 Anchor Bolt Eight 10D Common Nails Or 9 x 112 Strong Drive SD Screws