The heavy-duty California Umbrella 11 ft. Fiberglass Double Vent Sunbrella Market Umbrella offers all the features a residential or commercial owner demands with a robust, commercial-grade aluminum frame. The two-section aluminum pole with 2mm-thick walls and fiberglass rib framework deliver superior stability perfect for demanding commercial conditions. The strong aluminum pole frame is matched by a simple and efficient pulley lift system that completes this resilient, easy-to-use umbrella. One of the key benefits to this umbrella is a three-year warranty on the fiberglass ribs. This umbrella will hold up against anything you throw at it. About California Umbrella California Umbrella is known for producing high-end, quality patio umbrellas and frames for over 50 years. The California Umbrella trademark is immediately recognized for its standards in engineering and innovation among all the brands in the United States. As a leader in the industry, California Umbrella strives to provide you with products and service that will satisfy even the most demanding consumers. Its umbrellas are constructed to give the consumer many years of pleasure, and its canopy designs are limited only by the imagination. California Umbrella is dedicated to providing artistic, innovative, fashion-conscious, and high-quality products for all your needs. * Extra-large, 11-foot-diameter canopy * 8 heavy-duty fiberglass ribs * Highly durable 2-piece aluminum pole with 2mm wall thickness * Reinforced rib joints * Deluxe pulley lift system