Pack of 12,covering 12 square feet-1.5 inch thick acoustic wedge-shaped sound insulation board with 1 square foot per tile per square foot, and more placement and design options. Foam panels HIGHEST point reaches 1.5 inch height. Its LOWEST point reaches 1/2 inch in height.High-performing sound absorption foam panel that provides strong noise reduction over a wide range of frequencies. Damping and diffusing mid- and low-frequency sound waves inside the room to minimize interference. It can also help improve sound clarity in the room or space. Great use for media content (eg: YouTuber/music editing and recording, video game players). When used for acoustic treatment of walls or most common ceilings (especially ceilings that are not parallel to the floor), you can use sound-proof foam the ceiling. Soft/flexible-even very suitable as a sound insulation pad. Reduces standing waves and flutter echoes in small to medium sized rooms , when used in conjunction with corner bass absorbers and male/female broadband absorbers. Very suitable for processing sound of a recording studio or office-suitable for recording studios, control rooms, office home studios, home entertainment theaters, home office professional cinemas, concert , gymnasium sports centers, auditoriums, etc.! size:30x30x3cm Material:Polyurethane foam colour:Black Package Contents: 12 x Soundproofing Foam 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.