The Patio Umbrella Base by Nature Spring is perfect for securely supporting market umbrellas up to 11-foot canopy so you and your guests can enjoy quality sun protection while relaxing in the shade. Constructed of sturdy high-density Polyethylene (HDPE) plastic, this market umbrella base can hold up to 50 pounds of sand to ensure your umbrella will stand up to the wind and elements. The round base features a tightening knob for holding umbrella poles 1.5-1.8" in diameter and a convenient handle for moving the stand with ease. The attractive classic design provides an inviting decoration to complement any outdoor furniture and decor.