mineral fiber board feature: 1) Fire Performance: Meets GB8624-1997B1 Standards 2) Asbestos Free 3) Formaldehyde Free 4) Product Content: Mineral Fiber 5) Color of Surface: White 6) Noise Reduction Coefficient: Nrc 0.4 - 0.6 Depending On The Pattern 7) Light Reflectivity: More Than 85% 8) RH: >= 75% can up to 90% 9) sound absorption: EN20140-1994 10) Standard Thickness: 12-20mm 11) Standard Dimensions: 300x600, 600x600, 300x1200, 600x1200, 600x1800mm, 400*600mm, 610*610mm, 610*1210mm ect 12) edge details: flat,tregular, concealed and transcendent mortise bolt 15 days after receiving the advance 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 Paking message: 12mm, 14mm,15mm is 14pcs/carton, 18mm, 20mm is 10 pcs/carton the customers' labels and packing advices are accepted. OEM work is offered. 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.