<http://schema.org/description>
"Enables the spare tyre from the family car to be used as a power source.\nSimply insert adaptor  into the propel regulator and attach to valve on spare tyre.\nTyre must be on a rim.\nInflate to 40PSI"^^<http://www.w3.org/2001/XMLSchema#string>
<http://hobby.uk.com/spare-tyre-valve-adaptor.html>