Perfect Partner for Your Patio Umbrella!Our fillable patio cantilever umbrella base stand comes with 4 separate square plates, which can perfectly fit cross bases (not included) of your offset hanging umbrellas or double-top patio umbrellas. The base can be weighted down with up to 21.2 Gal water, 240 lbs sand, or 284 lbs sand and water, improving wind resistance and stability. Besides, it is made of premium Hdpe material, which can resist all weather, ensuring long-lasting durability. 4 plates can be stacked when not in use, therefore it would not take up much floor space for storage. And there exist grooved handles on the bottom, bringing convenience for transportation.