【30kg/m³ High Density - Professional Sound Absorbing】Made with flexible, professional-grade acoustic foam, our panels are non-toxic environmentally friendly, dense and consistent in firmness. Ensuring reliable acoustic absorption performance, effectively absorb unwanted flutter echoes. | 【Rapid Expansion】Our acoustic foam panels expand to full shape and size within hours, saving you time and eliminating the need to wait for 2-3 days. No more worrying about vacuum-sealed packaging! | 【Improve Sound Quality & Clarity】Our high-density acoustic foam panels helps break up sound waves providing the ideal level of moderate sound control on walls or ceilings.They're perfect for improving sound quality in video, audio recording, interview, meeting, podcast, live, music, and gaming rooms. | 【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 2 inches (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.