This shed extension kit will extend any 11 foot Lifetime shed (like models # 6433 or 60187) by another 60 inches. With the Lifetime Outdoor Storage Shed Extension Kit, you can add extra space to your existing Lifetime Shed. The Extension Kit was designed to provide you with an easy way to get more storage without having to invest in a new shed. Link below https://www.lifetime.com/lifetime-6426-11-foot-x-5-foot-shed-extension-kit Kit is new, packaged in unopened box and includes all flooring, wall and 2 windows sections required to make an existing shed larger... Thanks, open to offers