They come in two versions. You can order sliding glass doors mounted to the ceiling. And where there are suspended ceilings of gypsum plasterboard or quarters, appropriate reinforcement for the door weight will be required. Or you can choose sliding glass doors hinged to side glass. This option has a compact roller system that allows one glass layer slide against the other, sideways. The first door configuration requires a square support, while the others can bear on the round one. Both configurations have a maximum width of 120 cm.