- Absorber for optimizing room acoustics - Especially suitable for the absorption of low-frequency sound waves - Material: Polyester acoustic foam - Main frequency / effective range 80 to 1000 Hz - Flame-retardant according to FMVSS 302 Burn rate <100 mm / min - Dimensions: 370 x 370 x 600 mm - Colour: Anthracite / silver spruce - Shipping quantity: 2 Pieces EUR 77.00 - See more - Buy online