Eight metal ribs support the 9-ft polyester canopy to provide steady shade for outdoor tables and seating areas. The vented double top allows air to flow through the fabric to reduce wind pressure and help the umbrella stay more stable. A crank handle on the pole lets you open and close the canopy smoothly, while a push-button tilt joint helps you redirect shade as the sun moves. The 1.5-in diameter pole fits many patio table holes, and a strap secures the folded canopy for storage when not in use.