Usage Tips:[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, YouTube video and game live broadcast, these are essential products. Sound insulation foam is used to eliminate reverberation and sound reflection, professional studio-level acoustic treatment, slow down echo and external noise, so that the audience can hear more clearly.Colour: BlackMaterial: PolyurethaneSize: 30x30x2.5cmPackage Contents:24 x black acoustic foam board Only the above package content, other products are not included.Note: Light shooting 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. About Shipping: All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances.Any questions, please feel free to contact us During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours, wish you a happy shopping Thanks for your cooperation and we'll make you feel satisfied.