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 durable resin and cement, this weather resistant market umbrella base will ensure your umbrella will stand up to the wind and elements. The round base features a hard-plastic stem with easy-to-use tightening knob for holding umbrella poles 1.5-1.8" in diameter. The attractive ornate design provides an inviting decoration to complement any outdoor furniture and decor.