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Fiber Cement Board--Interior Acoustic Ceiling Sheet. Non-Asbestos Material: Made with 100% Non-asbestos Fiber Reinforced Calcium Silicate Board. Fire Resistant: Fire-resistant limit reaches 1h or more with no smoke production. Sound Absorption: Insulates against sounds of up to and over 40dB. Long Service Life: Useful life can reach 50 years or more. Light Weight: Ultra-light weight with density of 1100-1300KG/M3. High Bending Strength: Cross strength 6Mpa, Parallel strength 11Mpa. Durable and Easy Clean: Durable, difficult to deform, and easy to clean.