... wall, ceiling, partition.1.TYPE :A: Standard boardB: Fire-resistant boardC: Water resistant board2.Gypsum board edge:A: tapered edge (recessed edge)B ... request.4. function:The property of our products is: fire resistant, moisture resistant, sound insulation, heat preservation,etc5. Gypsum Board Parameters: Item ... irradiation Ir ≤ 1.3 (grade A) 0.1Note GB ISO Water Resistant Gypsum Board