Dear Sir Madam, Type:Acoustic wooden wall panelling Mateiral:MDF, MGO (magnesium oxide board) Sizmm Thickness:12 15 18mm Model:13 3,28 4,18 3,40 3,59 5 Finish:Melamine, veneer, metal, paint, anti-fire plate Fire rate:ASTM E84 Environmental protection level:E1 Installation:Aluminum keel, wood frame Application:Auditorium, Hall, Multifunction room, Studio,etc.