They're kg 4.2s because the woofer and passive radiator are the same size.
See Also
Cheap "cruz" bass on craigslist santa barbarasanta maria cars & trucks - craigslistsanta maria for sale - craigslistcraigslist: santa barbara jobs, apartments, for sale, services, community, and eventsThe ad's dimensions aren't exactly accurate to make it easy to determine which model they are,
but it's clear the owner doesn't know much about the speakers, hence the attractive price!
