HERTBER Sound-Absorbing Sheets, Soundproofing Panels, Set of 48, Black, Self-Adhesive, 30x30x3cm, Wall Mount, Suitable for Recording Rooms, Bedrooms,

[Easy to Install] - To solve the problem of difficult installation, we have upgraded the soundproofing sheet with a strong adhesive backing. Simply peel off the kraft paper backing of the soundproofing panel and fix it in the desired position. The self-adhesive design means there is no need for extra tape, just make sure the installation location is clean and dry. [Better Soundproofing] - These sound absorbing materials are specially designed in an egg shape to increase the contact area with sound, naturally increasing their ability to control echoes, waves and reverberation. This soundproofing material provides you with the best solution as part of a holistic approach to managing and mitigating unwanted acoustic problems. [Product Specifications] - Each pack of soundproofing mats measures 30 x 30 x 3cm. Each pack contains 48 packs of 3cm thick sound-absorbing foam. The high-density soundproofing sheeting (25kg/m³) is dense enough to absorb mid- to high-frequency sounds. Our soundproofing material is made from non-toxic urethane sponge. This means that the sound-absorbing sponge is absolutely safe and will not harm your health. [Fast Expansion] - With stronger elasticity, our black soundproofing panels expand quickly. They usually return to their original shape and size within 24 to 48 hours. Simply place the soundproofing panels in a well-ventilated area and they will expand naturally. [QUALITY GUARANTEE] - All our white sound-absorbing materials are regularly tested in our studio before hitting the market. Our self-adhesive soundproofing sheets are superior in quality to other similar products. Look no further than Hertber sound-absorbing boards. If you're not satisfied with the product, we guarantee a full refund or a free replacement.