Foneso Acoustic Panels: 1" X 12" X 12" (12 Pack) High Density, And Black. ?Rapid Expansion?What makes our acoustic foam panels unique is that they puff up to full shape and size rapidly. Usually it takes about 24 hours to expand,NO NEED to wait 2-3 days and greatly save your time! You won?t worry for the package of vacuum sealed any more. ?High Density - Professional Sound Absorbing?Made with flexible, professional-grade acoustic foam, our panels are dense and consistent in firmness, ensuring reliable acoustic absorption performance. They're perfect for removing echoes and background sounds in video, audio recording, interview, meeting, podcast, live, music, and gaming rooms. ?Improve Sound Quality Clarity?Our high dense acoustic foam panels can effectively delete standing waves and flutter. Sound listens less harsh and much clearer after these panels installed on wall or ceiling. Perfectly good for video, audio recording, interview, meeting, podcast, live, music, and gaming room. ?Easy to Install?Acoustic foam panels are lightweight and can be installed to a variety of different surfaces. Easy to shape and cut to size, altering won't affect acoustic foam's performance. No special tools are needed for installation. Please note: Double tape/strips or glue are not included in package, and must be purchased separately. ?Specifications and Service Guarantee? - Every package comes with 12 pack set acoustic foam panels which covers 12 sq ft in total. The dimension is 12 x 12 inches of 1 inch (from bottom to its peak) for each tile. If you have any questions about our Acoustic Foam Panels, feel free to contact us, we will reply you within 24 hours and give you a satisfactory solution.