Enjoy the convenience and stability of this umbrella base stand.Designed with 4 universal wheels, 2 of which are lockable, this mobile umbrella stand allows you to effortlessly move the parasol to where it is needed. You can fill the refillable reservoir with water or sand to add the weight of the patio umbrella base for enhanced stability. Besides, crafted from wind-resistant and heavy-duty materials, the square umbrella base ensures durability and reliability in any outdoor setting, be it a patio, poolside, deck, or lawn. Importantly, there are 2 receivers with different sizes for umbrella rods of different diameters. It’s easy for you to put all the parts together and insert the umbrella into the round tube.