... , textileindustry, seal, dustproof, cushion, quakeproof, heat preservation,heatproof,sound insulation, fire retardant,insulation.Filtration:air,petroleum,water.Polishing:marble,crystal,glass,jadeware ... -92. wool felt has passed the ISO 9001 certification.Material:100% WoolDensity(g/cm3): 0.09-0.44Thickness(mm): 0.5 ...