Features: Acoustic Foam Panels, 5cm thick, effective in reducing echo, reverberation, standing waves in small and medium-sized rooms. Offers high sound absorbing power, able to take care of the mid to high frequency ranges, helping you produce professional and high quality sounds. Comes in 12pcs, each size 30*30cm, which will be enough for you to DIY these panels, cut and reshape and install them however you want. A great solution for absorbing sound waves in a recording studio, broadcast booth, gaming room or podcast room, etc.