... -1997standard9.edge type :square ,flat,tregular, concealed and shiplap10.dimension: 300*600 ,300*1200 ,600*600 ,600*120011.Thermal conductivity: <= 0.065W ... .pattern: sand blast,pineholes,little star,lovely sworm14.founction: fireproofing,sound-absorbing, warm-keeping sound absorbtion mineral wool ceiling board