This commercial grade 7.5 Ft. aluminum rib market umbrella has a 1.5” diameter center pole and 1/8” square ribs. Aluminum square ribs provide a sturdy, quality framework that can better withstand abuse from weather and handling. The stainless steel parts and a silver mist coated frame provides protection against peeling. The pulley and pin system has a heavy duty cord that is resistant to sun and fraying. The durable 9 oz. marine grade fabric top has triple stitched pockets and is available in a variety of colors.