EASY INSTALLATION - If you know about acoustic foam , you know how easy it is to install. Backed with chewing , it is lightweight and can be attached to a of surfaces. No tools or materials are required for installation...the simple design will reduce your workload.Significant Sound Insulation - We are currently testing the insulation and from the test results, we know that the acoustic panels can effectively reduce noise and you with a comfortable environment. No matter how noisy your neighbors are, you can read some books in peace . Plus, you 't have to worry about disturbing people when gaming at high volume, as the Acoustic Panel will help you even more.Eliminates Echoes and Standing Waves - High-density material with particle design effectively absorbs noise and cancels echoes. Whether you are watching TV , playing the piano in the piano room, or even dancing in the room, the sound control panel will effectively reduce noise and you with the right environment to study and .Inflatable and Retardant - Maybe some people are wondering if these acoustic panels are safe. In fact, you 't need to worry because it is made of -friendly materials, which are -friendly, healthy and -friendly. We specially use a lighter to the acoustic panel to that the material is inflammatory and non-irritating odor, you can use it safely.Widely Use: The sound proofing foam squares are a low cost solution to better recordings or in the studio. That used for professional studios, rehearsal rooms, concert , podcasting, churches, home theaters, vocal booths, home,etc.Note: With adhesive, the color of the adhesive is random, you cannot to specifysize:30x30x3.5cmMaterial:Polyurethanecolour:BlackPackage Contents:12 x Soundproofing FoamOnly 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.