PIONEERED HOLLOWED OUT DESIGN: These unique hexagonal acoustic panels comes with the hottest color combinations. And each set includes 2 hollow out sound insulation panels which makes it more decorative. And the size enhances sound insulation.-ADHESIVE, EASY INSTALLATION: There is a -adhesive tab covering the entire back can easily stick to any surface. No special or materials are needed for installation. And you can easily cut the sound panels with a sharp knife to make different with the individual panels, and give full play to your creativity. SOUND ABSORPTION: 9.7 lb/ft density acoustic panels can effectively absorb reverb, flutter echoes, undesirable acoustic reflections, unwanted noises and reduce waves. They are perfect for game rooms, rehearsal rooms, concert , home theaters, etc. In addition to using sound proof panels for walls to dilute the sound, you can also it to enhance the acoustics in a room, like in a recording studio.HIGH-QUALITY & -: Our acoustic proof padding are made of high-density polyester fiber material, ensuring of noise reduction coefficient: 0.92 and absorption coefficient: 0.8 Besides abrasion resistance, and scratch resistance, they are odorless, formaldehyde-free, and retardant which is both safe to in and touch.Good sound absorption characteristics: If you are mixing in a studio, you must reduce the ambient sound. Unnecessary noise during recording will destroy it. The sound-absorbing board can absorb the sound produced by low frequency, middle frequency and high frequency, which is very suitable for recording.Adhesive color random, ' accept the specified color.Colour: black + white + silver grayMaterial: polyester fiber cottonSize: side length about 17.5cmPackage Contents:3 *Silver Soundproof Cotton4 * White soundproof cotton3 * Black soundproof cotton1 * Silver Hollow Soundproof Cotton1 * Black Hollow Soundproof CottonOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.