NBY series ceramice fiber board has high cold strength and hot strength . The density of board is from 250kg/M3 to 400kg/M3 NBY ... automatic wet vacuue forming process. The picture shows ceramic fiber board with wood pallet packing,density 280kg/m3,Thickness 25mm 4pcs ... +SIO29698--AL2O3+SIO2+ZrO2----99ZrO2---->10Density:250,280,300,320 ,350,400KG/M3 Size:Length*width(mm*mm):1200*1000, 1000 ...