Broken Bridge aluminum one cavity or two cavities, this "cavity" refers to the number of glasses.
Double layer hollow glass, consisting of two layers of glass and one cavity, it is called one cavity.
Three-layer hollow glass, made triplex glass two cavities are called two cavities.
Four-layer hollow glass consists of three cavities of four-layer glass, which is called three cavities.
Although the more the cavity, the better the sound insulation effect, it is not recommended to use four layers and three chambers for the windows at home. The glass is too heavy, and the hardware will be deformed and damaged after a long time.
Three glasses and two chambers of glass are enough.
