\begin{table}[H]
\centering
\begin{tblr}[         %% tabularray outer open
]                     %% tabularray outer close
{                     %% tabularray inner open
colspec={Q[]Q[]Q[]},
hline{2}={1-3}{solid, black, 0.05em},
hline{1}={1-3}{solid, black, 0.08em},
hline{5}={1-3}{solid, black, 0.08em},
}                     %% tabularray inner close
mpg & cyl & disp \\
21.0 & 6 & 160 \\
21.0 & 6 & 160 \\
22.8 & 4 & 108 \\
\end{tblr}
\end{table} 
