1. More perfect appearance. 2. Air-proof Water-proof and soundproof 3. Sound insulation 4. Certification: CE Specifications:1. Product Features: Air-proof, Water-proof, sound insulation, thermal insulation, Anti-aging, Good combustion-retarding performance, Resist impacts, Easy maintainance 2. Glass: 5mm, 8mm,11mm (5mm+6A+5mm),19mm (5mm+9A+5mm),22mm(5mm+12A+5mm),26mm(5mm+16A+5mm)etc;single- ...