12.7mm fiberglass ribs.
The strong aluminum pole frame is matched by a simple and efficient push lift system that completes a resilient and easy to use umbrella.5' Black Aluminum Market Patio Umbrella, Sunbrella Taupe This umbrella also features Sunbrella fabrics, which are built on a foundation of solution-dyed acrylic yarn, the most resilient and solid material for prolonged sun exposure, to offer even longer color retention rating than competing material sources. Deluxe push lift system. 2 section pole with over 2mm wall thickness.