... sound absorption ISO14001:2004 ISO9001:2008 CE 6.5-20mm mineral wool ceiling board with CEStandard Size 300*600mm,300*1200mm,600*600mm,600 ... : Conform to the quality requirments of standard board(12mm,14mm) according to JC/T 670-2005 Environmental portection :No asbestos,no ... 0.1mg/L Acoustical Performance: Comply with requirments of JC/T 670-2005 Product feature :Sound absorbing,resistance to fire,warm ...