Good sealing performance:Airtight performance directly affects the use function and energy consumption of doors and windows.  Airtight properties include water tightness,air tightness,heat insulation,sound insulation and other four aspects.  

Long service life. Aluminum double swing aluminum door due to light weight.  

High density. Precision processing and assembly.  Accurate, thus open and close light and flexible, no noise, easy to use and maintenance, corrosion resistance, small deformation, strong fire performance, long service life (30 years - 100 years).