[Specifications]: Coverage - 5.72 square feet; Weight - per piece - 20 kg/m; Design - Hexagon Bevel. [Excellent Acoustic Performance]: Acoustic foam panels are dense and thick open cell foam, perfect for eliminating room reverberation//standing waves/noise, improving sound clarity in the space; High NC (Noise Reduction Coefficient): 0.75. [Scope of application]: These soundproof foam boards are perfect for acoustic therapy; suitable for recording studios, home theaters, offices, home studios, vocal booths, basements, podcasts, , etc. [SUITABLE FOR INDOOR USE]: Eco-Friendly; These modern wave-style foam tiles are perfect for wall and ceiling art decorating. [Easy to Cut and Set]: Soft and flexible sound-absorbing foam is easy to cut and install. glue works well (Does not include glue). Colour: blue Material: polyurethane Size: 30x17.5x5cm Package Contents: 6 * Soundproof Foam Panels Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.