Soundproof sheets are applicable to rooms, piano rooms, recording studios, viewing rooms, offices, conference rooms, game rooms, and other places. You can use them as you like. Please rest assured that they are made of eco-friendly and fire-resistant urethane foam material. The products will arrive in a compressed state. After unpacking the product, soak it in water for 10-15 minutes (if you want to speed up the expansion, you can gently pull the soundproof sheet by hand while soaking it in water to restore its shape), squeeze it, and dry it to recover. Our products do not include tape. Please purchase double-sided tape or spray adhesive separately according to the usage scene and the condition of the wall. Sonic Acoustics Sound Absorbing Material Soundproof Sheet 30*30*5cm Extra Thick Soundproof Wall High Density Urethane Foam Sound Absorbing Panel Sound Absorption Measures Interior Decoration Musical Instruments Noise Reduction Noise Prevention (1.08㎡ 12 sheets) Black ☘️Thank you for visiting☘️ ⚠️ Since it also includes imported products, there may be imperfections in the construction, scratches, and stains. Please refrain from purchasing if you are looking for perfection‼️ ★ If there are any problems, please contact us before evaluation‼️ ★ Immediate purchase & no comments OK◎ ★ All products are free shipping! ★ Please note that the product may be out of stock as it is also listed on other flea market sites! Simple packaging and the cheapest shipping will be used. ＊ We have listed valuable information in our profile❣️ S38-5＊＊＊＊