Description:1. Great design for low frequency sound absorption.2. Great fire- retardant material.3. Excellent acoustic properties.4. Eco-friendly acoustic foam panels.5. Provides strong noise reduction.6. Absorb sound, keep warm, heat insulation, good elasticity.7. Shockproof, moisture-proof, against friction.8. Fit for sound proofing in car, home, office, building, etc. Specification: Function Sound Proofing Color Black Material Cell Foam Cotton Size 30x 50cm Thickness 5mm Quantity 6pcs Application Door, Chassis, Rear Trunk, etc Package Included:6 X Sound Proofing Deadening