YGM Acoustic Rockwool® - Set of 8 | 40" x 20" x 3" | Sound Absorption Panels | NRC 1.0, 80 KG/M¬≥ Density | Room Isolation & Acoustical Soundproofing (Silver Grey) rockwool and 2 ft × 2

and 2 ft × 2 ft panel sizes with 10mm thickness

It may look thin or not as expected in first look but Please follow the "How to restore Vacuum Compressed Packaging" instructions given in the second Image of this product or the instruction pamphlet that you will find inside the package

HIGH DENSITY: Great for spot treatThe density of the product is 50kg/m3

delivering better echo control and overall acoustic performance

BETTER ABSORBPTION: Wedge 2 inch Foam panels are best for echo reduction

YGM Acoustic Rockwool® - Set of 8 | 40" x 20" x 3" | Sound Absorption Panels | NRC 1.0, 80 KG/M¬≥ Density | Room Isolation & Acoustical Soundproofing (Silver Grey) rockwool and 2 ft × 2The Professional Rockwool Acoustical Panels are Superior in sound absorption with NRC = 1 providing clearer, more enjoyable sound environment. 3 Inch Thick High Density Acoustic Core Extra depth provides superior low frequency absorption, effectively reducing echo, reverberation, and mid bass buildup for clearer speech and tighter, more controlled sound. Integrated 1 Inch Air Gap for Enhanced Absorption Built with a rear air cavity that improves sound