Plastic film Greenhouse Structure : hot galvanized steel, 20years service life. No welding, connected by screws.Easy to install. Plastic film: 3layer, anti-uv ,anti-drop ,and anti-dusty. The service life is 3-5years. Connected with the structure by trough and spring. Arch type roof, have good ventilation Equipments for choice: ventilation,insect net,cooling system,heating system,irrigation,fertilizer,computer control We have advanced hydroponic system We can make design according to customer's specific requirements.