Features: 1) Material: special grade of gypsum (whiteness: >90°, breaking strength: 2.7M Features:1) Material: special grade of gypsum (whiteness: >90°, breaking strength: 2.7MPa/2 hours, no impurity), fiberglass, hollow fiber2) Finish: drying by oven, smooth surface, clear flower pattern, obvious three- dimension effect, high strength, and excellent constructive performance. It is fireproof ...