Each piece of this outdoor umbrella base can be filled with 42 lbs. of sand or 11.3 liters of water. It can also be filled with a mixture of water and sand to further increase the weight, ensuring stable support for the outdoor umbrella in different environments. Its unique and sturdy 4-plate design is quite eye-catching. Composed of 4 detachable umbrella base weight plates, it is a perfect partner for most types of cantilever offset patio umbrellas, providing extremely stable support. However, the crossbar base needs to be equipped separately. In terms of filling and protection, each weight plate is equipped with a filling spout and a twist cap, which can easily achieve a waterproof seal. Whether filling with water or sand, it can be done effortlessly, and it effectively prevents liquid leakage. Made of PE plastic, it has excellent durability and crack resistance. When exposed to direct sunlight, a humid environment, or other outdoor factors for a long time, it can effectively avoid performance degradation and always maintain a good condition, providing lasting and stable support for your outdoor umbrella. Whether in the courtyard, on the patio, or in outdoor leisure places, it can become a reliable shading auxiliary tool. Color: Black.