1.above 30% sound aborsorption 2.fire proof Sound-absorbing sponge (15-90 usually thickness) mm * * 2m, ... etc. Used sound-absorbing, sound insulation, shockproof, fire.Professional production and sales of polyurethane foam, the products are ordinary foam, foam ... filtering foam high-resilience sponge foam, memory foam pillow, all kinds of package, foam, printer cartridges, special and special foam. ...