Create 57 square feet of shade with this nautical striped 9' diameter market style umbrella, octagon shape with 8 ribs, single wind vent at the top. The fabric is a 100% solution-dyed polyester, called Obravia. The pole is rust-resistant aluminum, a black powder coat finish, with a crank lift and push button at the top to tilt the umbrella to increase the blocking of the sun's rays when needed. Split pole for easy install and removal when not in use, splits below the crank mechanism. Shown with the recommended 50 lb umbrella base, sold separately. Recommend a protective umbrella cover to be used when this umbrella is not in use not only to protect the fabric, it keeps the umbrella clean and ready to use, sold separately.