... ,thermal insulation 2.sound absorption 3.Non-combustible, 4.nontoxic fiber glass roll R-valueLength (mm)Width (mm)Thickness (mm)R ... The Centrifugal Glass Wool Blanket/Felt/Roll and Board are excellent heat preservation and sound absorption material for steel structure, ceiling, outer ... to the skin. Owing to glass wool's good performance, e.g., thin and long inner fiber, low thermal conductivity, it ...