Corner Wall Foam is used with Wall Panels to cover up the 4 corners of the roomFor use in home theaters, movie theaters, concert , gymnasiums sports centers, recording studios, auditoriums and more!, High Quality Durability and EffectiveDampens and diffuses mid to low frequency sound waves inside of a room to minimize interference, Increases increasing sound clarityType: Absorption Tile/PanelDensity: 25kg/m3Fireproof standard: CA117Shape: small trapQuantity: 8colour: BlackMaterial: Polyurethanesize: 12*12*24CMPackage Contents:8* Acoustic Foam PanelsOnly 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.