-Large base with 150 lbs capacity is free to add wet sand to enhance stability -Match well with 1.5"-1.9" umbrella poles and 7.5 ft-11 ft patio umbrella -Built-in drain hole and large capacity make it a perfect flower box -Hand-turn knob is easy to tighten the umbrella pole into the base -Powder coated steel base is rust resistant and sturdy -Equipped with 2 wheels for effortless movement -Practical design is ideal for various occasions -Detailed instruction guide you quickly get a stable patio