Crafted Design: Custom designed for the Grand Patio 10×13FT outdoor cantilever aluminum umbrella. Not suitable for DOUBLE-SIDED cantilever umbrella Weight Capacity: The umbrella base has four independent filling bags inside, which can be only filled with sand with a total weight of 105 pounds per bag to ensure that the umbrella is stable, even in breezy conditions. NOTE: Don't fill with water, just sand Extra Durability: The base is made of high-quality aluminum with an oxidized finish that protects against the sun and rust. Plus, the top of the umbrella base has four guards made of PS strips with faux wood grain to improve both its weather resistance and appearance Location Flexibility: The umbrella comes with four wheels that make it easy to move to different outdoor locations. Two of the wheels are fixed positioning wheels that stabilize the umbrella base and prevent it from moving Dimensions: Enhance your outdoor relaxation experience with our cantilever aluminum umbrella and mobile umbrella base. Overall Umbrella Base: 40.15''×40.15''×9.05''. Sandbag: 19.68''×19.68''×6.3'' Grand patio Cantilever Aluminum Umbrella Base with Faux Wood Grain, Only Sand Filled 420LBS Umbrella Base with 4 Sandbags, Black Aluminum Structure