Add a sturdy base to your new patio umbrella! Don't worry about your umbrella blowing away in the wind, because the 180-pound base filled with sand or water is enough to support most cantilever umbrellas. Made of high-density polyethylene, the square umbrella base is very strong and, most importantly, waterproof and weather-resistant. The four Hdpe plates, which are interlinked by pins, are sturdy and space-free, suitable for cantilever and offset umbrellas with a cross base. Solid black finishes and symmetrical patterns on finishes will bring you an outdoor experience that is both elegant and functional.