This 15 ft. double-side patio umbrella keeps extra large spaces of your outdoor living space shaded with your family and friends, which is a perfect choice for both residential and commercial locations, such as garden, balcony, deck, pool or coffee place. If you need to use this umbrella, you may need to buy the umbrella base which is not included, pls note that the diameter of this double patio umbrella pole is 1.9", so please recommend the inner diameter of base should be 1.9" and stand weight should be up to 60 lbs. Like the almost umbrella, this double-side patio umbrella is made of 100% high quality polyester canopy which is waterproof, fade resistant and easy to clean, also blocks most harmful UV rays and have better color fastness performance, and the frame is made of rust-free powder coated steel pole and sturdy heavy duty square ribs for longer usage. Umbrella rope can carry 550 pounds.Wind vents on the top features excellent air circulation, allow air to flow and have a good stability.