The value of $\backslash ($ a $\backslash )$ is $127$ mm $.$

All parts have a thickness of $1\mathrm{.}0$ mm apart from the lower horizontal part which has a thickness of $2\mathrm{.}7$ mm $.$

Enter your answer as an integer, in $\backslash (\backslash$mathrm$\{$mm$\}^\{4\}\backslash ),$ but without any units. You have an error margin of $\backslash (3\backslash \%\backslash )$