<https://www.estationsrq.com/product/tube-700-x-23-32-presta-48mm-maxxis-welterweight/#product>
<http://schema.org/description>
"Puncture resistant .9mm wall thickness butyl tube\r\n \tRemovable valve core (RVC) allows use of sealant"
<https://www.estationsrq.com/product/tube-700-x-23-32-presta-48mm-maxxis-welterweight/>