Secure, reliable support for pergola, carport, and verandah posts start with this U-Cup Post Support. Built to anchor 75mm square posts to timber decks or concrete bases, it delivers a solid, wind-ready foundation for outdoor structures. Finished in hot-dip galvanised steel, this post support stands up to the elements while keeping installation straightforward. The design includes a 25mm shaft diameter and an M12 bolt hole at the base, with a Ø13.5mm base bolt hole to keep posts firmly in place. Key details Post size: 75mm (W) x 105mm (H) Shaft height: 75mm Shaft diameter: 25mm Post bolt hole: M12 Base bolt hole: Ø13.5mm Material/Finish: Steel, hot-dip galvanised Shipping options available. In‑store pickup available — contact us for pickup location & hours.