Designed with a large reservoir that can be filled with sand or water to add stability-Comes with a built-in handle on the bottom, only weighs 5 lbs, easy carrying-Equipped with protective pads on the bottom, keeping the umbrella base stable-Made of high-strength HDPE material, waterproof, aging-resistant, durable enough-Equipped with 2 adapters, suitable for most patio umbrellas with 1.5"/1.9" pole diameters -Equipped with a hand-turn tightening knob for securing the umbrella on the base-Suitab