1.mineral wool fiber 2.years quality guarantee 3.heatly and eco-friendly 4.elegant designs and sizes 1.meterials: mineral cotton ,compound fiber2.surface : moistureproof ,dope,mouldproof ,ethylene coating,fireproof reagent3.humidity resistance: >75%4.NRC:0.4-0.6 Depending On The Pattern And The Thickness5.environmental production: 100% asbestos-free6.bending strength:>250N7.acoustical performance ...