Stable Support: Each post base measures 3.78 x 3.78 inches, with a total of 8 pieces. The size of the internal tube is 3.6 x 3.6 inches and the bottom cross-section size is 5.5 x 5.5 inches. It is recommended for use with 3.5 x 3.5 inch posts. The fully enclosed design provides secure and effective support.

Durable and Sturdy: This support base is made of carbon steel with a wall thickness of 0.08 inches, ensuring long-lasting durability. The surface is coated with electrostatic paint for resistance to corrosion and rust.

Installation: Installation is straightforward, following the user manual. Simply drill holes with an electric drill, use the holes for the screws, and secure them with screws.

Complete Accessories: The post anchoring includes M8*60 self-tapping screws, ph12*60 expansion screws, M8 washers, M5*25 wood screws, and a double-ended wrench 8-13.

Wide Application: The screws are suitable for concrete and wood floor installations. This post base can be used in pergolas, porch railings, and column supports.

• Kit Quantity: 8 pieces
• External Dimensions: 3.78 x 3.78 inches / 96 x 96 mm
• Internal Dimensions: 3.6 x 3.6 inches / 92 x 92 mm
• Base Cross-section: 5.5 x 5.5 inches / 140 x 140 mm
• Wall Thickness: 2 mm
• Product Dimensions: 5.51 x 5.51 x 5.51 inches / 140 x 140 x 140 mm