Coolaroo Cantilever Umbrella, Freestanding Patio Shade Umbrella, 90% UV Block, Round 12', Smoke Provides 110 sq. Ft. Of cover Easy to clean, mold and mildew resistant All metal work is powder coated Knitted HDPE fabric provides 90% UV block These do not come with an umbrella base but with a cross beam that needs to be bolted down and/or pavers or base added for extra stability (base or pavers not included).