-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 4.5 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 plastic inserts suitable for most umbrella poles 1.5"/1.9" -Equipped with a hand-turn tightening knob for securing the umbrella on the base-Suitable for various res