it's light,high strength,high stiffness,superior flatness,sound insulation Aluminum honeycomb:a new kind of decoration ... l-beam,the fine structure of the panel insure its superior performance.It has the features such as:LIGHT,HIGH STRENGTH,HIGH ... STIFFNESS,SUPERIOR FLATNESS,SOUND INSULATION,HEAT INSULATION AND INSULATION,FIREPROOF,MOISTURE RESISTANCE ...