Unique Design: The umbrella base features a manual tightening knob that can secure the umbrella in place. This anti-scratch base features a marble pattern on the surface, making it very classic and attractive. Heavy-Duty Umbrella Base: This umbrella base is made of high-quality steel with a heavy duty and weather-resistant structure,and does not require water filling. Stable Structure: The square umbrella base has a large area, which is stable and sturdy. 4 adjustable feet at the bottom to fit uneven ground. It will be a perfect addition to your patio, garden, yard, and poolside, commercial places. Easy to Assemble: Easy assembly required, and an adult can complete the assembly within 5 minutes. Please assemble it according to the step-by-step instructions in the manual. Fit 1.5’’- 1.9’’ Dia of Umbrella Pole: This patio umbrella base comes with 3 caps to fit 1.5’’ to 1.9’’ diameter of umbrella pole. Please measure your umbrella pole diameter first to make sure this stand will fit. To choose the tube cap on the top of the pole so that your umbrella pole will fit. Important Notice: Please measure your umbrella pole’s diameter or your umbrella table’s size first to make sure our base will fit. If you have any question or problem, please don’t hesitate to contact us. Item Descriptions:Crestlive Products 30lbs market umbrella base will be perfect for your patio umbrella, pole’s diameter at 1.5-1.9 inch. Features durable, heavy, with classic square design, it will be a nice choice for you to hold your umbrella in your patio, garden, yard, and poolside, even in commercial places. Warm Tips: Please measure your umbrella pole’s diameter first to ensure this stand will fit. And please also measure the stand size if you want to put it under your umbrella table.Item Specifications: Fit Umbrella Type: Market Umbrella Material: Steel Overall Size: Tube Diameter: 1.5-1.9 inch