Usage Tips:HEXAGON SHAPED&BEVELED EDGE DESIGN: acoustic panels provides moderate sound control on walls or ceilings. with professional acoustic control, sound suppression, acoustic processing, noise reduction, the sound absorbing panels are to reduce the waves, reverb and flutter in small and medium-sized rooms. QUALITY: Made from 230kg/m3 high density polyester felt fabric, our soundproof wall panel does well in reducing noise, eliminating sound impurities and improving speech intelligibility. We on using sound absorbing panels to it's flame retardant, odorless, resistant, and fade resistant. Furthermore, the acoustical wall panels achieve of noise reduction coefficient: 0.95 and absorption coefficient: 0.8! COLORFUL: Professional sound proofing padding are great for spot treating sound on walls in your studio or office. Special Color acoustic art panels are the to decorate your recording studios, control rooms, offices home studios, home theaters, home offices. More sound proof foams.It's safe to touch and breath in because of the odorless and eco friendly soundproof material. Let's start architectural decoration and enjoy a soon! EASY TO INSTALL: This self adhesive acoustic absorbing polyester fibreboard with double sided tape is easy to installation. High density acoustic polyester fibre board is easy to cut with a knife and be created different styles of decorative wall art in your favorite space! Widespread use: With professional acoustic control and acoustic processing, our sound absorbing panel is to reduce the noise, reverb and at bedrooms, home theaters, vocal booths, home studios, offices, and in professional studios, concert , theaters, conference , rehearsal rooms,classrooms. Colour:blue+white(The color of the adhesive is random, and the specified color is not accepted) Material:polyester fiber cotton Size:Sidelength 17.5cm Package Contents:8 * White sound insulation board8 * Blue sound insulation board 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.