1) CE & ISO certificates; 2) High quality. Fearture:. Excellent thermal resistant. Rvalue=0.31(m2.k/w). Excellent acoustical performance. High quality paintedsurface with 1 coats of paint. High content of Slag-wood, no waste paper, no perlite & no asbestos used. Sharp, strong surface & edgesDimensin:600*600*7.5mm600*600*9mm600*1200*7.5mm600*1200*9mmetc. PVC Gypsum Ceiling board plaster board