... non-corrosive aluminum construction of this system is ideal for high humidity environments or wet-cleaned areas.Application: Airport,Subway, ... Grille ceilingProduct:Aluminum grille ceiling, grille ceiling, metal grille ceilingMaterial:high quality Aluminum alloySize:10*40, 15*50mm,20*45mm,length ... ,meeting room,supermarket,school,corridor,toilet,hospital,re-decoration works. Artistic Metal Ceiling