Specifications: Thickness: 3mm--18mm Standard size: 1220mm*2440mm Density: 0.85-1.27(g/cm3) Bending strength: 18 Mpa Breaking load: 113-498 Thermal resistance: 1.14m2k/w Sound Insulations: >44db Shrinking rate when heated: 1.0% Rate of length change (wetting %): Below 0.26% Non flammability : Fire proof 1st grade