# How to write the unit milli tesla meter?

Right now I am using mTm (code: \unit{10}{\milli\tesla\meter}). I wanted the output to look like mT-m. The SIunits package documents talks about half-high dot but doesn't mention any hyphen. Any ideas?

-
With the siunitx package you can easily do \sisetup{inter-unit-product = {-}}. –  Qrrbrbirlbel Sep 17 '12 at 22:44
Is the hyphen allowed by SI rules? –  egreg Sep 17 '12 at 22:49
Good point. Just that I have seen really good textbooks in engineering include the hyphen in their units. Right now I am using \usk. –  Shashank Sawant Sep 18 '12 at 1:20

I wouldn't write it like that.

\documentclass{article}
\usepackage{siunitx}
\DeclareSIUnit\mt{\milli\tesla} %% A method for say short cut or new unit!
\sisetup{inter-unit-product = {-}}

\begin{document}
\SI{40}{\mt\meter}

\SI{40}{\milli\tesla\meter}
\end{document}

-