4x4 post base: Designed for nominal 4x4 lumber (actual size 3.5"x3.5"). The inner diameter of 3.6" ensures easy insertion. It fasteners securely onto wood or concrete, providing sturdy support for pergola, deck, patio, fence, mailbox Raised isolation: Design with 2.5mm thick columns lifts posts off the ground, preventing moisture intrusion. 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. Quality black powder-coating resists corrosion and rust. The smooth finish adds elegance and ensures longevity Versatile: 4x4 post base add stability to deck railing, pergola, fence, and mailbox. 4x4 concrete post base sides adapt to situations where a full four.
eBay