The wool felt is made from 100% raw wool ,different colors are available. Product’s NameWool feltUsageFelted wool is used in mechanism, aviation, shipping, train, auto, metallurgy, chemical, industry, textileindustry, seal, dustproof, cushion, quakeproof, heat preservation,heatproof,sound insulation, fire retardant,insulation.Filtration:air,petroleum,water.Polishing:marble,crystal,glass,jadeware, ...