\begin{table}%t4
\caption{\label{Zubko2004}Size range and mass densities of the three dust grain components from \citet{Zubko2004}.}
%\centering
\small
 \begin{tabular}{cccc}
 \hline
 \hline\noalign{\smallskip}
 & PAHs & Graphites & Silicates \\
\hline
\noalign{\smallskip}
Minimum Size  (\mic) & 3.5 $\times$ 10$^{-4}$ & 3.5 $\times$ 10$^{-4}$ & 3.5 $\times$ 10$^{-4}$\\
Maximum Size  (\mic)& 5 $\times$ 10$^{-3}$ & 0.33 & 0.37 \\
Mass density  (g cm$^{-3}$) & 2.24 & 2.24 & 3.5\\
\hline
\end{tabular}
\vspace*{5mm}
\end{table}