"Umbrella base mobility can be a struggle, making you chase the sun rather than relax in the shade. Sudden gusts of wind can also turn a peaceful afternoon into a moment of anxiety. This Outsunny patio umbrella base glides effortlessly on four wheels and locks securely with two brakes. Fill it with up to 88 lbs. of sand or 70 lbs of water for solid stability, accommodating both 1.5"" Dia. and 1.89"" Dia. poles"