Isoking High Density Bare Fiberglass Board Substrate for Acoustic Panels. A1 Non-Combustible Rating: Panels meet Class A fireproof standards for maximum safety in industrial and commercial buildings. Excellent Sound Absorption: High acoustic performance effectively reduces noise in factories, warehouses, and office spaces. Customizable Specifications: Available in thickness 50-150mm, density 80-180kg/m3, and various colors to match project needs. NRC (Noise Reduction Coefficient) rating ranging from 0.8 to 0.9. They effectively absorb medium-to-high frequency sound waves, drastically reducing background noise, reverberation, and indoor echo. Advanced Production Technology: Double crawler machine and edge sealing ensure superior flatness, bonding, and tear resistance. Flexible OEM/ODM Service: Full customization, minor customization, and design-based options available for diverse projects.