This incredible umbrella offers the strength and beauty of stainless steel with the innovation of a premium fiberglass rib system. This combination adds flexibility and longevity under windy conditions by using a more resilient fiberglass. In addition, its substantial and strong single piece pole has twice the wall thickness of the average umbrella. A deluxe pulley lift system completes the simple and sleek design that satisfies the demand of a commercial customer. This umbrella also features a double vent cut and an Olefin fabric which is made with high durability synthetic Olefin fibers that offer improved fade resistance. Olefin fabric Commercial grade design Extra Large 11 foot diameter canopy Double wind vent canopy design 8 premium durable fiberglass ribs with half inch wall thickness Riveted and reinforced rib joints High durable aluminum hub Deluxe pulley lift system Durable 1.5"stainless steel pole with 2mm wall thickness