<https://thelordofbass.com/product/12-mega-roll-subwoofer-cone-2-5-vcid/#product>
<http://schema.org/description>
"12\" Mega Roll Subwoofer Cone 2.5\" VCID\r\n\r\n \tCone body Material: Semi pressed Kraft Pulp\r\n \tSurround Material: Foam  \r\n \tCone Height: 2.89\"  (73.4mm)\r\n \tOuter Diameter:  12\"  (305mm)\r\n \tSurround Height:  1.417\"  (38mm)\r\n \tSurround Width: 1.653\"  (42mm)\r\n \tVoice Coil Opening: 2.57\"  (65.4mm)\r\n \tCone Mass: 184 grams\r\n \tDust Cap Notch: N/A\r\n\r\n "
<https://thelordofbass.com/product/12-mega-roll-subwoofer-cone-2-5-vcid/>