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. Bullet Point: Large Capacity for Water/Sand: The fillable umbrella base can resist strong winds and heavy rain, always remaining stable. The umbrella stand has an injection hole on the side, with a maximum capacity of 16 kg with water and 25 kg with sand.Easy Mobility in Multiple Scenarios: There are 4 universal wheels, so you can effortlessly move the umbrella base and umbrella around in the poolside, backyard, garden or patio. 2 of the wheels are equipped with brakes that keep the mobile market stand in place.Robust and Long-lasting Material: Made of premium and high-strength PE material, the square umbrella stand is weather-resistant and built to last. What's more, the bottom concave hole design can support the surface of the umbrella base for enhanced hardness and non-deformability.Applicable Umbrella Rod Size: This mobile umbrella base stand has 2 receivers with a diameter of 40 mm and 55 mm. Therefore, the umbrella base fits the vast majority of umbrella rods and can accommodate the umbrella rod diameter of 32mm or 48mm.Quick and Easy Installation: The screw-in structure without any hardware required provides you with easy installation. You just have to insert the tube into the hole, put in the receiver, tighten the fixed knob, fill the umbrella base with water/sand, and then close the cover of the water injection hole. Features: Fill the base with water or sand through the water injection hole 4 casters are designed for easy movement 2 wheels are lockable for added stability Convenient built-in handles help to carry the umbrella base easily High-strength PE material can ensure long-term use Bottom concave hole design increases the hardness of the surface A tightening knob for securing the umbrella on the base Fit most patio umbrellas with 32mm/48 mm pole diameters With a maximum water capacity of 16 kg and a maximum sand capacity of 25 kg Suitable for various occasions, like patio, poolside, tennis court, etc. Easy to assemble with just a few accessories Specifications: Color: Black Material: PE, Plastic Product Dimension: 45 cm x 44 cm x 40 cm (L x W x H) Length of the Tube: 24 cm Interior Diameter of the Larger Receiver: 55 mm Interior Diameter of the Smaller Receiver: 40 mm Diameter of the Water Injection Hole: 4 cm Applicable Umbrella Rod Size: 32mm/48 mm (Dia.) Maximum Water Capacity: 16 kg Maximum Sand Capacity: 25 kg Net Weight: 3 kg Package Includes: 1 x Umbrella Base 1 x Tube 1 x Fixed Knob 1 x Receiver 1 x User’s Manual