All of greenhouses are made with top quality aluminum frames . Each greenhouse has been designed with a special grooved channel frame to help reinforce the panels against wind and weather. This quality greenhouse is backed up by a 20-year structural warranty for your peace of mind. The glass greenhouse offers modern appearance, stable structure, and best light transmission, is a good choice as high-end greenhouse. Advantages:Simple and effective solution for varied and complex topographic conditionsThe structure we use hot dip galvanized pipe to avoid rust. Can add below systems: (Depend on customers' request)