[Environmental protection material] The sound insulation foam panel is made of environmentally friendly high-density polyurethane foam, which is flame-retardant and non-toxic. Professional sound-absorbing foam, safe to use. [Widely used] These studio absorption foams are widely used in homes, offices, recording studios, ceilings, cinemas, game rooms, vocal pavilions, and control rooms. Will not interfere with each other! [Easy to install] We are equipped It can be installed on walls, ceilings, doors and windows. No tools are needed and it will not be damaged. You can cut the size according to your needs without affecting its performance. [Perfect sound-absorbing performance] For professional recording, video and game live broadcast, these are . Sound insulation foam is used to eliminate reverberation and sound reflection, professional studio-level acoustic treatment, and external noise, so that the audience can hear more clearly. Colour: Black Material: Polyurethane Size: 30x30x2.5cm Package Contents: 24 x black acoustic foam board 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.