mineral fiber ceiling feature: 1) Fire Performance: Meet GB8624-1997 Class B1 2) Asbestos Free 3) Formaldehyde Free 4) Fiber content: >=90% 5) Color of Surface: White 6) Noise Reduction Coefficient: Nrc 0.4 - 0.6 Depending On The Pattern And The Thickness 7) Light Reflectivity: More Than 85% 8) RH: >= 75% 9) sound absorption: EN20140-1994 10) Standard Thickness: 12mm, 14mm, 15mm, 18mm, 20mm 11) Standard Dimensions: (300)600*600(1200/1800), 595*595, 595*1195, 603*603 12) edge details: flat,tregular, concealed and shiplap 13) water content: <=3% 14) mold resistant 15) Thermal conductivity: <= 0.065W/mK useness: office, halls, amphitheatres, medical environment, clean room, computation rooms, business builidings, asepsis workshop,boardrooms, medical care centers, optimistic offices, studios and places requested for special acoustics Quality Certificate: ISO9001:2000, ISO14001, CE Certificate the ceiling products can be loaded with T-bar together in one Container. Exported and sold: England, Ireland, New Zealand, Singapore, Taiwan, Hongkong, Turkey and India, etc.