Durable Material: This concrete weighted umbrella base is constructed of sturdy powder coated steel with cement.It has good solidity and would not let the umbrella tilt easily. 3 Open Cap Sizes: Versatile base's tube includes multiple cap sizes to fit umbrella poles with diameters 1 3/8", 1 1/2", 1 8/9". Versatile Occasion: It could be suitable for different decor design, you could put it in balcony, yard or beside the swimming pool. Dimension: Overall dimensions: 17.72"(L) x 17.72"(W) x 16.93"(H); 1.57inch thick. Please confirm the size before purchasing. Easy to Install: The installation is very easy and no additional tools are required.