Corner Wall Foam is used with Wall Panels to cover up the 4 corners of the room For use in home theaters, professional movie theaters, concert halls, gymnasiums sports centers, recording studios, auditoriums and more! Professional, High Quality Durability and Effective Dampens and diffuses mid to low frequency sound waves inside of a room to minimize interference, Increases increasing sound clarity Type: Absorption Tile/Panel Density: 25kg/m3 Fireproof standard: CA117 Shape: small bass trap Quantity: 8 colour: Black Material: Polyurethane size: 12*12*24CM Package Contents: 8* Acoustic Foam Panels Only the above package content, other products are not included. Note: Light shooting 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.