Telescope's Easy Lever-Lift locks into place automatically when the umbrella is opened. This truly creative new mechanism takes the hassle out of opening and closing your market umbrella. This Lever is offered on both our wood and aluminum framed umbrella. Our strong support ribs are designed so the fabric sits off the ribs, to reduce abrasion from the wind. The cover snaps on and off easily. All our market umbrellas come with an easy tilt mechanism. Telescope offers three convenient vented market umbrella sizes in 8ft., 9ft., and 10ft. diameters.