Unique Triangular groove shape; not only beautiful; can effectively absorb high school low frequency sound; remove echo reverberation; make the sound become more energetic.ideal for control rooms; mixing rooms; listening rooms; home theaters. Features: 1. Multiple functions: Sound absorption; noise reduction; sound quality improvement; acoustic diffusion; decoration. 2. Color can be selected by yourself; splicing is simple; utility knife portable cutting; create your own style. 3. Our foam is very easy to clean, just use a hand vacuum on a low setting to remove any dust accumulation. 4. Can help increase sound clarity in a room or space. Great use for media content. 5. Light weight soundproof foam easy can be applied on ceilings. Soft / flexible - great for sound proof . 6. High density, fireproof, non-flammable. 7. Good for recording studios, vocal booths, home theaters Specification: Condition: 100% brand new Material:Polyurethane Weight: Approx.780g Size:(approx) 50*50*5cm/19.6*19.6*1.96inch Color:Black Package include: 6*soundproof foam Note: 1. Please allow slight error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.