  We present a new set of zero metallicity models in the range 13-80 $\rm
M_\odot$ together to the associated explosive nucleosynthesis. These models are
fully homogeneous with the solar metallicity set we published in Limongi &
Chieffi (2006) and will be freely available at the web site
http://www.iasf-roma.inaf.it./orfeo/public{\_}html. A comparison between these
yields and an average star that represents the average behavior of most of the
very metal poor stars in the range $\rm -5.0<[Fe/H]<-2.5$ confirms previous
findings that only a fraction of the elemental [X/Fe] may be fitted by the
ejecta of $\it standard$ core collapse supernovae.
