t.akustik Wedges 30, Foam Absorber, Material: Flexible polyurethane foam, Bulk density: 25.0 ± 5%, Compression hardness at 40% deformation: 5.0 ± 0.5 kPa, Tensile strength at least 100 kPa, Elongation at break min. 80%, Flame retardant according to MVSS 302 (burning rate