How to get the unit from the parameter?

Hello there!
I am struggling to display the UT_Length units, which are “mm”


I will appreciate your suggestions.
P.S.
Is it possible to do it without the lengthy Python script from the topic below?

What do you want to do with the ‘mm’?

Are the lengths the same as the Project Units?

Or do you have Families which don’t use the Project Units?

Maybe this and this helps?

Thank you, @bvs1982
I wanted to compare the units in Revit and Excel file, however it is not really needed, as the units can be just set in the Excel column to be mm or whatever.
Yes, the lengths are the same and I do not use the Families with different Project Units.