<https://www.auralexchange.com/product/nankarrow-isoduct-1m-x-1m-nitrile-rubber-sound-insulation-2-2/#product>
<http://schema.org/description>
"Extreme Airborne noise insulation in ventilated enclosures and ducts\r\n \tThermal conductivity: 0,048 W/(m•K)\r\n \tFire classification C-s3,d0 Class 1 EN 13501-1 BS 476 Part 6/7\r\n \tSize : 1 m X 1 m\r\n \tThickness : 10 mm / 20 mm / 25mm / 40 mm / 50 mm\r\n \tColour: Black"
<https://www.auralexchange.com/product/nankarrow-isoduct-1m-x-1m-nitrile-rubber-sound-insulation-2-2/>