The Vinyl Keystone gazebo is available in two sizes, 10′ & 12′ octagons, built from pressure-treated southern yellow pine and covered in low-maintenance white vinyl. Our Keystone gazebos come standard with solid 4×4 posts and anchor brackets. They are engineered to withstand 40 lbs. of snow load and 100 mph wind speeds. The rafters are made of a double 2×4 to carry the heavier snow loads and keep from warping. The beautiful 1×6 ceiling boards add additional durability and charm. You can add optional screens and a cupola.