Our Garden Umbrellas have (6) 3/8" ribs, a .065" wall thickness and come with a crank-lift mechanism. These umbrellas are used with a Textilene Fabric - a coated mesh with approximately 80% sun blockage. Umbrellas can be ordered in either a WHITE or CHAMPAGNE colored pole and in a solid textilene color or alternating colors of Blue/White; Red/White; Forest Green/White or Yellow/White. ALL UMBRELLAS MUST BE SECURED TO THE TABLES. Umbrella Collars are shipped standard with each Wabash Umbrella and should be used for securing.