t.akustik SA-N30 8pc Set, Absorber Set, Includes 8 convoluted foam panels, Main effective range: From approximately 2500 Hz, Material: Polyurethane soft foam, Bulk density: 25 kg/m³, Compression hardness at 40% deformation: 5.0 ± 0.5 kPa, Tensile strength: Minimum 100 kPa, Elongation: Minimum 80%, Flame retardant according to MVSS 302 (burning rate < 100 mm / min.) corresponds to DIN 4102 B3 (combustible), Board size: 1000 x 500 x 40 mm, Suitable adhesive: Article no. #177265# (not included)