Acoustic wall panel set, wall thickness 25 mm, gray mottled, pack of 4 pieces, HxW 650 x 325 mm. In the speech-relevant frequency range of 250 - 2500 Hz, up to 80% of the incident sound waves are absorbed. With a high density of approximately 120 kg/m³, good sound insulation is achieved in addition to sound absorption. Made from high-quality polyester fleece, certified according to Ökotex Standard 100, and flame retardant. For wall mounting, magnetic strips are attached to the back of the panels. The panels can then be affixed to metal plates that are secured to the wall with double-sided tape, allowing for easy adjustment of their position.