insulation glass wool felt with cerficate 1.sound insulation 2.Thermal insulation 3.Thernal ... fiber, limestone,quanz sand, ores as main materials, coordinating with some chemical materials, such as soda ash, borax.2. ... :From R3.0-R3.5Size:1160*580mm,1160*430mmPacking:with HDPE packing Per bag: 16 pack or 12pack or 10 packspecial ... -3332528Fax:0086-592-3332531 insulation glass wool felt with cerficate