... A1 Non-combustiblity 3)thermal insulation,sound absorption High quality water heater insulation blanketDescription:We are top manufacturer of Centrifugal Glass Wool ... Grade A1GB 8624-1997Reshrinking temp. ≥250GB/T 11835-1998Thermal conductibilityw/m.k0.038-0.06GB/T 10294-1988Hydrophobicity ≥98.2GB/T ... -30000120025-15012,16,20,24,32,40,48 High quality water heater insulation blanket