Systems Trading EG45810 8- By 10-Foot Backyard Hobby Greenhouse, Green Greenhouse with automatic roof vent, double doors and side shelves 4 mm twin polycarbonate thermoplastic for optimal durability, insulation Hinged double doors for easy access; side vents and automatic roof-vent for airflow Shelves on 2 walls for starts and shorter plants; 100 percent UV protection protects skin Heavy gauge aluminum frame for durability; measures 8 by 10 by 7-1/2 feet