... , 1200*3000mm,1200*3600mm,1800/2400/2700/3000x900x12.5mm Gypsum Board.size: 1220*2440mm, 1200*2400mm, 1200*2500mm, 1200 ... swelling ratio: 3% Description or definition: Vanjoin Gypsum board material is widely used in home decoration andceilings Plaster ... board is divided into ordinary, fire-resistant, water-resistant, and several other varieties. good. Gypsum board