Weighted patio umbrella base uses a fillable HDPE reservoir and metal pole holder to stabilize your outdoor shade. The 21.5 x 21.5 x 15 in body can be filled with water, sand or both to reach a max load capacity of 154 lbs, helping keep 6-10 ft umbrellas steady. Two adjustable handles and a built-in stabilizer secure 1.5-1.9 in poles to keep them upright. Four wheels, including two lockable, let you roll the base into position, park it securely and store the pole in the hidden slot when not in use.