phoakm
Senior Member
looks like for creating mini-compartments - partition the bag vertically... :dunno:
http://www.flickr.com/photos/type665/2097557443/ - how to use the three pieces on the top of the photo? (not my photo)
As what madmacs had mentioned, it is used for creating mini-compartments in the bag.
The thing I like thinktank is they provide additional dividers for creating compartments to own likings.

I seldom use this, normally use the 2 tall ones. Cheers!