[Easy to install, Saving Time & Money] With the self-adhesive design, you just need to tear off the top liner on the back and stick the soundproof panels to the wall. If you've ever seen an introduction to other panels before, you'll know how easy to mount our acoustic panels. Besides, you don't need to purchase any extra double-sided tape or glass glue, save your time and money. [ Design] Acoustic Panels is a modular acoustic design element with shapes and colors. You can boldly define your space and improve acoustic performance with its linear design. Make your walls more special. [Safe Materials and High Density] Made of 100% high-quality polyester fiber material, odorless, B1 class flame retardant, it is safe to breathe in and touch. High Density-250kg/m3. easy to cut with a knife to make different . [What's the Effect] Sound insulation panels help reduce unwanted reflected sound in any room of your home or building, they are and are easy to mount , doors and ceiling. Help reduce background noise, echoes, reverberation time(RT), and decrease standing waves (that's what makes noisy studios or offices so bad). [Decoration and Creativity] The CNC cutting styling links together across tiles and can be oriented in a variety of directions to create multiple looks. Come and put artistic acoustic panels on your walls to create your own acoustically perfect space! Colour:Gray Material:Polyester Size:300x300x9mm Package Contents: 12 * Acoustic Panels with Self-Adhesive Only the above package content, other products are not included. Note: Light reflection 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.