Specifications: Color: Black Material: HDPE, Metal Overall Dimensions: 21" x 21" x 17.5" (L x W x H) Size of the Planter Box: 21" x 21" x 12"(L x W x H) Size of the Table Tray: 21" x 21" (L x W) Interior Size: 17.5" x 18" x 9.5" (L x W x H) Suitable Umbrella Pole Diameter: 1.5"/1.9" Suitable Patio Umbrella Size: 6/7/8/9/10 ft Suitable Offset Umbrella Size: 9/10 ft Fill Capacity of the Sand: 175 lbs Fill Capacity of the Water: 14.5 Gal Net Weight: 21 lbs Key Features: ● 3-in-1 Multi-functional Design: This outdoor umbrella base is designed in a box shape with a lid, which can also be served as a garden end table or as a planter box for cultivating flowers or herbs. More than that, it has a table tray to hold drinks and snacks within reach. ● Water or Sand Filling: The refillable umbrella base comes with a weighted bag filled with 14.5 Gal water or 175 lbs of sand, keeping your umbrella upright during windy conditions. And you can also add some weighs in the box for enhancing wind resistance and stability. ● Fits Various Umbrella Sizes: The patio umbrella stand is equipped with a metal supporting pole and 2 adapters, which can accommodate most 6/7/8/9/10 ft umbrellas and 9/10 ft offset umbrellas. And it is suitable for patio umbrella poles with 1.5"/1.9" pole diameters. But the table tray only fits 1.5" umbrella poles. ● Easy Movement: The mobile umbrella stand is designed with 2 built-in wheels and 2 side handles, allowing you to take your umbrella anywhere you want, such as patio, poolside, beach, terrace, deck, lawn, garden, and other scenarios as well as a variety of commercial uses. ● Sturdy and Stable Construction: The outdoor umbrella base is crafted of high-strength HDPE material, preventing cracking or fading in all weather. And with the wood-like finish, it can also perfectly blend into your rustic garden. In addition, there exist 2 adjustable fixed knobs to secure the umbrella, preventing wobbling firmly.