The DuPont ™ Premium powder-coated finish of the Round Style Storage Shelter, 1-5/8" Frame, Green Cover 13 x 28 x 10 ft.'s all-steel frame resists rust and corrosion. The patent-pending ShelterLock® Stabilizers at every rib connection adds rock-solid strength and stability to frame. Bolt-together hardware at every connection point ensures maximum strength and durability. The Ratchet Tite™ Tension System and Easy-Glide Sliding Cross Rails keep the cover smooth and taut. Advanced engineered, commercial grade polyethylene woven fabric is UV treated inside and out to stand up to the elements. Ultra heavy-duty PVC cover also available. Universal steel foot plates for easy and solid connection to ground anchors, cement or pony walls. Front and back zippered doors for easy-access drive-through capability.