DuraMax Model 80211 Stronglasting 3.02m x 2.4m Greenhouses give high quality and value. There is 13.4cubic meter of space. The walls are made of unbreakable solid polycarbonate which is the same material used in bulletproof shielding. They will not shatter or break like glass so there is no safety concern. They are ultra-violet resistant. The polycarbonate will not tear like less expensive, flimsy poly sheets. The walls are further strengthen by a metal supporting structure and are rated as "all-weather durable" so they will not rot or rust. The design is contemporary and will enhance your backyard or garden. Features: adjustable roof vent for temperature control, 159cm tall double sliding doors, door handle has padlock eyes, and the foundation kit in included. US Polymers Inc. is the largest plastic extruder in the world, every product is backed with warranty and full customer support.