Perfect to use for deadening the acoustic reflections within a small room like gaming room, recording studio, theaters, and more places when you need universal sound reduction. These tape will leave no sticky adhesive behind; Wash it with water and dry it to regain its stickiness when the tape gets dirty. It can easily adhere and hold strongly on a variety of surfaces including painted walls, finished wood, glass, tile, metal, and other smooth surfaces. Developed especially for optimizing sound quality and reduction, the foam panels reverb, echoing, and waves, enhancing sound quality of room. Perfect for recording studios, home theaters, or universal sound reduction. Made of flame-retardant, environmentally friendly polyurethane foam, the sound absorbing foam is formaldehyde-free. In case of fire, it will automatically extinguish within 5 seconds after leaving the fire source. Simply cut off the tape, stick to the acoustic foam along the edges or in each corner, and then stick to the wall. No need to buy additional nails or glue. No special tools or materials are needed for installation. Name: Soundproof foam cotton Colour: black Material: polyurethane Size: 30 x 30 x 2.5cm Package Contents: 12 x sound-absorbing cotton 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.