The fireproof grade is A1 grade ,toxic gas safty gade ... replace wood, planer, nail, drilling, finishes second process 1.Fireproof, heat insulation, non-combustible,1200 °Cnon-combustible, 1600°C ... porcelain of will happen2.Acoustic composite board,There are natural sound-absorbing effect.3.Waterproof, corrosion ... deformation, the surface is smooth, easy to process. fireproof panel