Product Features: 【Filled with Water/Sand】- This round umbrella base can be weighed with 220 pounds of sand or 26 liters of water. You can also mix some water and sand to increase the weight. 【High Quality Material】- Made of sturdy and durable high-density polyethylene plastic, it is durable in all weather. It can be used for several years. Including a galvanized steel pipe, not easy to corrode, has good firmness. 【Fit for Various Umbrellas】- The multifunctional patio umbrella base can accommodate all patio umbrella and market umbrella. With two adjustable knobs, used to secure the umbrella to the base. Very suitable for a market umbrella with a pole (diameter of 1.5 "-1.89"). 【Easy to Install and Store】- Just follow the instructions to install all the components together. When not in use, it’s advised to disassemble the steel tube for compact space. 【Widely Used】- The Outdoor umbrella base can be used on various occasions, both at home and commercially, perfect for lawn, beach, garden, balcony, deck, pool, barbecue bar, and so on.