The series products are made up of fire-resistant high-grade engineering plastics. They have many advantages that other electric boses can't compare with, such as reliable insulating property, high strength, fine fire resistance, corrosion resisting, novel model, beautiful and clean surface, and long operation life and so on. And their color can be mixed atrandom. They are widely used in housing construction and civil electricity transformation. The new products that adopt strict rain-resistant design are suitable for outdoor installation to ensure safe operation of the electric meter.