... *2500mm, 1200*3000mm,1200*3600mm,1800/2400/2700/3000x900x12.5mm gypsum ceiling boardsize: 1220*2440mm, 1200*2400mm, 1200*2500mm, 1200*3000mm,1200 ... 13.5% Wet swelling ratio: 3% Description or definition: Vanjoin Gypsum board material is widely used in home decoration andceilings Plaster ... into ordinary, fire-resistant, water-resistant, and several other varieties gypsum ceiling board