We use the solar composition proposed by \cite{2005ASPC..336...25A}. The opacities in our code are extracted from the OPAL tables \cite{ir96}. Fig. \ref{fig:opacity} shows the opacity coefficient as function of temperature in our 60\({\,\mathrm{M}_\odot}\) models for various metallicities. The peaks at \({\log\, T}\simeq 4.7\) and \({\log\, T}\simeq 5.3\) are caused by helium and iron, respectively. The peak at \({\log\, T}\simeq 6.2-6.3\) is caused by carbon, oxygen and iron. We use the metallicity dependent mass-loss predictions of \cite{Vink2001} .