About this item 100% Polyester Aluminum frame More Shade for You :This 15ft double-sided patio umbrella provides extra large shades to your outdoor living space,which is ideal for residential and commercial locations. Easy to Operate Crank Mechanism:This outdoor patio umbrella has a crank mechanism,you can easily open and close the umbrella by rotating the handle.Built-in a full bulletproof rope connecting the top cloth and the crank, making the umbrella life longer. The heavy-duty rod has a design that is easy to assemble, easy to screw in. High-Performance Fabric: Made of 100% polyester, which is water-resistant, UV resistant and fade resistant. Easy to clean. Designed to give you a long-last outdoor living. Sturdy structure: Powder-coated steel pole and rust-proof steel ribs provide enhanced durability to this umbrella. Powder-coated 1.9"(48mm) steel pole and 12 sturdy steel ribs all with rust-free powder coated lightweight pole. Using durable, waterproof, and breathable polyester fabric that could withstand for a very long time without fading. It blocks 99% UV, making it more suitable for your leisure time. Umbrella Base is NOT Included:Please note that the umbrella base is not included , please purchase it separately.Since the umbrella is considerably large , we recommend you to use umbrella base which weights more than 100 lbs. To avoid damage in extreme weather, please close the umbrella in windy or extreme days.