The Galvabond Flat Top Steel Post Cap is specifically designed for square post size 90x90mm. This post cap is made from galvabond steel, ensuring strength and durability for long-lasting performance. It features a flat top design that adds a sleek and finished look to your square posts. The galvabond coating provides corrosion resistance, making it suitable for outdoor applications. The post cap is easy to install and securely fits onto the square posts, offering protection and enhancing the overall appearance of your project.