mineral fiber ceiling board standard size: 300x600mm, 600x600mm, 600x1200mm thickness size : 7.0mm, 8.0mm, 9.0mm, 10mm, 12mm, 14mm, 15mm ,18mm features: 1) material: mineral fiber acoustic ceiling board 2) surface: a variety of surface patterns available 3) coating: pvda 4) color: white 5) density: 391kg/m©ø 6) fiber content: >=90% 7) fire performance: meet jc/t670-2005 8) fracture load by bending (n) : 192n £¨600x600x12mm£© 9) damping index: 2.7 (rh90%¡¾3%,temperature 40¡é¡¾2¡é) 10) noise reduction coefficient: nrc 0.35 - 0.6 depending on the pattern and the thickness 11) light reflectivity: >=85% 12) no asbestos