... weight, environment friendly 2,free resistance, waterproof 3,easy install and concise Performance:Fire resistance: made of aluminum alloy, this ... product has the excellent fire resistance, and is corrosion resistant and easy to clean, complying with requirements of enviornmental ... *500, 600*600, 300*500, 300*600, 300*900 and 600*12000,.Patterns of ceilings with open keels (iterated plates ...