The size??220x2440x4mm-40mmMaterials: Tobermorite, cement, Quartz sand, reinforced fiberFire-proof rate: A-class incombustible (GB8624-1997)Incombustibility: 240 minutes (GB/T9978-1999)Density: 1.30-1.70g/cm3Moisture: <12%Heat conduction: 0.24W/MK (Jc/t564) Average Sound-proof: 45db (GBJ75-84)Anti-bend strength: >16MPa (GB/T7019-1997)Moisture movement rate: <0.19% (GB/T7019-1997)Dry shrinking rate: <0.09% (GB/T7019-1997)Radiation rate: According with Standard (GB6566-2000)