This DuraMax Foundati Kit for the Pent Roof Shed 8’x4′ is a great soluti to keep your shed level and square. Made of galvanized metal, it provides a base for installing a shed. It eases the installati process and ensures the shed is square. It elevates the shed floor off of the ground for lger life. And shed installati can begin right away with cfidence and ease. US Polymers Inc. is the largest plastic extruder in the world, every product is backed with warranty and full customer support.