FLUKA pre-defined single-element

Tell please pre-defined single-element FLUKA materials which are here

http://www.fluka.org/content/manuals/online/5.2.html

are materials with natural isotopic content or this is just one isotope materials containing one isotope ?

Please note that the manual for FLUKA as distributed from https://fluka.cern and supported on this forum is this one.
The listed single-element materials have natural isotope abundance.