VENTILATED TOP DESIGN: This 12x9 ft cantilever patio umbrella features a double top for superior wind resistance and breathability, which can provides 108 square feet of shade. Perfect for commercial and residential use, such as patio, pool, garden, deck, and outdoor dining area. HYDRAULIC ADJUSTMENT SYSTEM: Cantilever umbrella with a hydraulic mechanism for easy push-and-pull operation, along with a convenient handle on the offset umbrella ribs for effortless opening and closing. Easily adjust height and angle for optimal shade. Rotate 360 degrees without moving the base for ultimate flexibility. SUPERIOR OUTDOOR UMBRELLA FABRIC: The umbrella outdoor patio is made of high-quality 250/gsm Solution-Dyed Fabric with a PA coating, strong and dualble. which can offers excellent UPF 50+ UV protection, waterproof, and fade resistance for up to 5 years. STURDY FRAME STRUCTURE: The large patio umbrella is constructed with a full aluminum Pole and 8 heavy-duty ribs, featuring anti-oxidation paint for rust resistance and longer lifespan. We recommend to remove and store the pool umbrella during windy conditions above 30 mph to extend its service life. EASY ASSEMBLY: The outdoor patio umbrella comes with a fillable base, just fill the base with water and sand filler for safe and stable outdoor use. If you have any questions about the product, please feel free to contact us. Our professional customer service team will serve you promptly. 12x9 ft Cantilever Patio Umbrella with Base Included