ammoon 12 Pack Studio Acoustic Foams Sponge Panels Tiles Absorption Sound Insulation Foam Rhombus Flame-retardant High D

12 pack, each size of acoustic foam is 30 * 30cm / 12 * 12in.
Perfect for reduce annoy waves, reverb and flutter echoes in small space.
Ideal for recording studios, vocal booths, home theaters, etc.
Environment-friendly and no dust sponge, high density and flame-retardant.
Beautiful sound brings you more pleasant with it.