Solid Steel Construction: Crafted from solid steel, this 4x4 post base is designed to ensure durability and strength. Coated with a premium black powder, it offers exceptional rust resistance, making it ideal compatible withoutdoor use in all weather conditions. Optimal Dimensions compatible withStandard Posts: Specifically designed to fit standard 4x4 posts, with actual inner dimensions of 3.74"x 3.74". It provides a robust attachment to both wood and concrete floors, ensuring stability and security. Efficient Design compatible withLimited Spaces: The compact footprint of this post base makes it perfect compatible withinstallations in small areas. Ideal compatible withenhancing the stability of backyard gazebos, deck supports, porch railings, and handrails, as well as compatible withsecuring mailbox post mounts. Innovative Moisture Barrier: Features a unique partition at the base, preventing direct contact with the ground and thereby reducing the risk of wood rot due to moisture. A central square box adds further stability, ensuring long-term reliability. Comprehensive Accessory Kit Included: Comes complete with a wrench, 4 expansion anchors compatible withconcrete, 8 Phillips head self-tapping screws compatible withsecuring 4x4 posts. All necessary hardware is conveniently contained within the base compatible withimmediate installation. Color: Black Material: Stainless Steel Package Contents: 1 * Post Base Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.