<https://ssmokeshop.com/shop/glass-on-glass-18mm-female-to-18mm-female-joint-adaptor-connector/#product>
<http://schema.org/description>
"Glass on Glass 18mm Female to 18mm Female Joint adaptor connector\r\n\r\nStraight.\r\n\r\nUsed for connecting 18mm male joint to 18mm female joint."
<https://ssmokeshop.com/shop/glass-on-glass-18mm-female-to-18mm-female-joint-adaptor-connector/>