... hot strength . The density of board is from 250kg/M3 to 400kg/M3 NBY series ceramice fiber board is made from full ... , fire safety, noise, insulationDensity:250,280,300,320 ,350,400KG/M3 Size:Length*Width(mm*mm):1200*1000, 1000*600,900 ... *600T(mm):6,10,13, 20,25,30,40,50,75,100