Enjoy modern style and incredible strength with the California Umbrella 11 ft Stainless Steel Commercial Grade Market Umbrella. Single pole construction gives this umbrella commercial strength and a 2mm thick wall of stainless steel makes it super resilient. It features eight fiberglass ribs, each with a .5-inch thick wall. The fiberglass makes this umbrella extremely flexible in windy conditions, making it more resilient and adding to its longevity. The simple, sleek design is completed with a deluxe pulley lift system. You have the choice of two grades of Sunbrella fabrics for your shade. All Sunbrella fabrics are the best you can buy, and these shades have a 5-year warranty against fading. Grade A fabrics are solution dyed canvas colors. Grade AA are solution dyed canvas colors in deep, rich tones. We recommend a 50 to 70 lb. umbrella stand for through-table use, or a 100+ lb. stand for freestanding use or for any kind of use in a particularly windy area. < About Sunbrella Sunbrella has been the leader in performance fabrics for over 45 years. Impeccable quality, sophisticated styling and best-in-class warranties prove the new generation of Sunbrella offers more possibilities than ever. Sunbrella fabrics are breathable and water-repellant. If kept dry, they will not support the growth of mildew as natural fibers will. Beautiful and durable, Sunbrella is a name you can trust in your outdoor furniture. Cleaning and Caring for Sunbrella Regular maintenance is the best way to keep your Sunbrella fabrics looking good and delay deep, vigorous cleaning. Brush off dirt before it becomes embedded in the fabrics, and wipe up spills as soon as they occur. For light cleaning, use a mild soap and water solution and a sponge, allowing your cleaning solution to soak into the fabric. Rinse thoroughly to remove all soap residue and allow fabric to air dry. For more specifics on maintaining Sunbrella fabrics, visit Sunbrella.com.