This square umbrella stand is made of heavy granite stone, which ensures that your shade provider remains stable during gusts of wind due to its substantial weight. The tube of the granite base is made from durable stainless steel, making it resistant to UV rays, water, and corrosion. The diameter of the tube can be adjusted to fit the umbrella pole using the included adapter. The practical carrying handle and integrated wheels not only make it easier to lift and transport but also to reposition or move the umbrella holder.