1. Strong aluminum frame for minimal maintenance. 2. Hollow polycarbonate sheet for covered material, has a good characteristic of preserving heat, impact resistance and flexural strength, which ensure durability for greenhouse. 3. Safe polycarbonate does not shatter and is advanced insulation. Easy to handle no sharp edges. Diffuses light reduces direct sun light. 4. Double sliding doors and four roof windows for excellent ventilation. 5. Unique design ensures easier installation and diy per the detailed assembly instructions attached. 6. Galvanized base can ensure maximum stability of your greenhouse and can resist against the hit of hail and storm. 365*210*210(12'x7'x7')