4×4″ Post Base Avant - Building Centre Protects against rot caused by water exposure, extending post life and enhancing overall safety. 𝗥𝗼𝗯𝘂𝘀𝘁 𝗗𝘂𝗿𝗮𝗯𝗶𝗹𝗶𝘁𝘆: Crafted from solid steel 2mm thick, with precision full-weld construction. It anchors securely onto wood or concrete, providing sturdy support for pergolas, decks, patios, fences, mailboxes, etc., 𝗥𝗮𝗶𝘀𝗲𝗱 𝗜𝘀𝗼𝗹𝗮𝘁𝗶𝗼𝗻: Unique design with 2., 5mm thick columns lifts posts off the ground, preventing moisture intrusion. Post Anchor Standoff Post Base - Post Brackets - The Home Depot Fence Post Supports For Wooden Posts This listing is for a pack of 20 Plinths for 4 x 4 turned post or columns. dimensions are 3 1/4 inches x 3 1/4 inches x 1 inch tall. Aluminum casting, will... Quality black powder-coating resists corrosion and rust. The inner diameter of 3., 6 ensures easy insertion. 4 x 4 Post Base - Heavy Duty Carbon Steel 4x4 Post Base for Concrete Ground and Soil Ground - Mailbox Mounting Plate for Mailbox Post, Deck, Porch and 4x4 post bracket sides adapt to situations where a full four-sided base can't be used, seamlessly integrating with various terrains.