Glass wool felt main specification Length: 5000-30000mm Width: 1200mm Thickness: 25-150mm Density: 12,16,20,24,32,40,48kg/m3 Thermal conductivity: 0.038-0.06W/mK Average Fiber dia.:less than 5.5 Grade of combustibility:Non combustible Grade A Hydrophobicity:More than 98.2% Sound Absorption coefficient: 1.03 product reverberation method 24kg/m3 2000HZ