About this item Alloy Steel frame 【Material】Fabric Top Cover, Alloy Steel Frame, Powder Coated Aluminum Pole(Diameter Size Φ48x1.0mm) and 12 Strong Steel Ribs with 48 Lights Provide Enhanced Durability. 【Advantage Design】15Ft x 8.3Ft Extra-Large Double-Sided Patio Umbrellas, Sturdy and Stable, Polyester Fabric Material Umbrella Top Cloth, Shading, Water Resistant, and Ultraviolet Rays. 【Adjustable】Large Size Patio Umbrella, Crank Handle Easier To Open and Close. Not Include Weigt Base. 【Other Question】On the Top of the Patio Umbrella is Equipped with 3 Solar Panels, If the Solar Panels Still Don't Work After You Follow the Instructions, Please Contact the Seller's Customer Service for a Free Replacement (Receiving the Product Within 3 Months, Man-Made Damage is not Included). 【Customer Service】All Questions From Customers Will be Answered within 24 Hours. If You Have Any Questions, Please Contact and Send an Email to the Customer Service Staff of The Store. We Will Take Every Customer's Question Seriously.