... insulation 4.fireproof and waterproof5.easily installed6.environmental friendlyAluminum Ceiling, Metallic Ceiling, Aluminum Composite PanelThe plane square panel and the ... heat-insulation materials areacoustic mineral wool, acoustic fiber paper, foam material, acoustic wool and so on.It can be ... effects.5.very excellent visual extenion of space. acoustic ceiling tiles ,600mm*600mm ,good quality