Cement fiber board is basically no shrinkage and deformation,fireproof, waterproof, sound insulation, heat insulation Cement fiber board is noncombustible(GB8624 Class A), and has excellent quality that reach JC688-2006. features: super strim appearance, hardly has shrinkage and deformation specification: length: 2.28m ~ 3m, width: 900mm ~ 1220mm thickness: 7.5mm ~ 12mm. cement fiber board