[Self-adhesive] The third-generation sound insulation foam panel is easy to install, and the entire back has glue, which is convenient for fixing on walls and ceilings. Installation requires no additional tools or materials. Tear off the tissue paper and paste [Better Sound Absorption] The thicker the foam, the better the sound absorption. acoustic foam panels are 2 inches (-5.1cm) and 1inch(-2.5cm) thicker than 1inch(-2.5cm), a 35% increase in effectiveness. When you play guitar or piano, you 't have to worry about disturbing others.[DIY Cutting Decoration] You can cut any size you with scissors, the change will not affect the performance. You can your favorite decorative pattern with studio foam in a of colors.[-friendly and fireproof] soundproofing pads are made of -friendly polyurethane foam, they are professional grade non-toxic and odorless foam. In addition, we retardant formula to the sponge to reduce sudden danger and safety.[WIDELY USED] Widely used in recording studios, home theaters, vocal booths, conference rooms and control rooms. The larger the area of sound insulation foam, the better the noise reduction effect. 12 packs cover 1.12 square , each tile is 2inch thick with 2inch thick acoustic .Colour:black+blueMaterial:PolyurethaneSize: 30 x 30 x 5cmPackage Contents:6 x Black sound-absorbing cotton6 x blue sound-absorbing cottonNote: With adhesive, adhesive: random color, 't accept the specified colorOnly the above package content, other are not included.Note: Light and different displays may cause the color of the item in the a little different from the real . The measurement allowed is +/- 1-3cm.