Dear Sir/Madam, Function:Smoke-Proof,Sound-Absorbing,Soundproof,Mould-Proof,Moisture-Proof Feature:Artistic Ceilings Ceiling Tile Shape:Square Ceiling Tile Type:Plasterboard Ceilings Product Name:PVC Gypsum Ceiling Tiles Front Side:PVC Film Coreboard:Standard Paper-faced Gypsum Board Back Side:Aluminum Foil Edge:Square Edge With Tape or Without Tape Strength:170N Moisture Content:0.2% Thermal Conductivity:0.16 W/m.k Light Reflectance:75% Certificate:ISO,SGS,CE Show More