Is there a Tkinter widget like Scale with two sliders?

[WLigtenberg at gmail.com]

Hi,
I'm looking for a Scale like Tkinter widget that has two sliders, so
that the user can select both the upper and lower bound of some
dataset.
Much like the widgets used in spotfire: http://wiserways.com/images/2004-02-10/intro_spotfire.jpg
(see the widgets on the right of the picture)
Thanks in advance!