Technical characteristics.1. Sound absorption: polyester fiber is combed, punched, heated and compressed together. So its unique porous structure can absorb the noise effectively. NRC reach at 0.8.2. Fire resistance: special raw material combines our special manufacturing to ensure the fire retardant. A grade based on ASTM-E843. Heat preservation: porous polyester batts can keep thermal inside to save energy.4. Environment-friendly: no toxic, without any glue or formaldehyde.5. Moisture-proof: in the wet environment, the panel can be anti-fungal.Composition: 100% PET (Polyethylene Terephthalate)Size: 2440*1220mm Thickness: 9mmDensity: 216kg/m3 (The highest available in the country).For custom size, please call or text us for pricing and information.Lead/Order Time: 3-20 days excluding Sundays and Holidays depending upon the color and quantity needed. Please contact us for any urgent requirements.