The Pole Shaft is One-Piece Extruded Fluted .120 (11 Guage) Aluminum with a 4" O.D. in Direct Burial and Anchor Base Styles. The Anchor Base is Die Cast Aluminum Welded to the Shaft. Textured Architectural Black Powdercoat Finish, Baked to Ensure Maximum Paint Adhesion, Hardness and Durability. Optional Square Formed and Riveted Aluminum Cover or Decorative Two-Piece Wrap-Around Cast Aluminum Base Available (Sold Separately). Includes Removable 3" Aluminum Reducing Tenon with Black Powdercoat Finish and Stainless Steel Hardware.