... outdoor noise.3. Safety:As a result of double or single glass structure, therefore have a resist of outside the ... high-rise building, coastal construction and train windows.4. Anti-frost: hollow glass, low moisture permeability, no frost phenomena. To provide ... 52mm 3. Maximum Size range: 2500 × 3500mmProduct use: Doors, windows, walls, ceilings, floors, walls; roof light and skylight industrial ...