12pcs 30x30x2.5cm Acoustic Foam Soundproof Studio Foam Soundproofing Panels Cinema Muffler Sponge Absorption Treatment Panel for Walls Sound Absorbing 12pcs 30x30x2.5cm Acoustic Foam Soundproof Studio Foam Soundproofing Panels Cinema Muffler Sponge Absorption Treatment Panel for Walls Sound Absorbing | 1876627 Price: USD 16.99