The door can be locked 4mm double-wall panels keep the heat in effectively, as well as allowing sunlight to reach your plants, flowers and herbs to promote healthy, all-year round growth Lightweight yet durable aluminium frame with rust-resistant hardware, alongside reinforced poles for extra support Galvanized base ensures even stability and easy set up Tilted roof with rain gutters so liquids don't build up and stagnate Large, single door, provides easy access in and out Assembly required One window for good ventilation Outsunny Clear Polycarbonate Greenhouse | Living Social | Living Social