... . 3,install easily. Acoustic mineral wool ceiling board: SUNSHINE brand Acoustic mineral wool ceiling board presents the art of ... 595mm,600mm or 12’’,24’’Thickness:6mm,6.5mm,7mm,7.5mm,8mm,9mm,10mm,12mm,13mm,14mm,15mm,16mm ... Qualified(Grade A,GB5464-85)Anti-sinking property:≤3.5mm(JC670-1997)Coefficient of heat condition:0.065W/ ... ,bedroom,Subway platform,passageway,etc. Acoustic mineral wool ceiling board