Vertical line on main page items

I would like to add a vertical line below each item displayed on my main page the same as when you click on the NEW Products link on the left sidebox or the Featured products link on the right sidebox.
My site is located at: http://30408.vws.magma.ca/TTEZENCART.

What I need to know is where do i make these changes. Is It In the stylesheet.

For some reasons some of the sidebox limks have them and others don't.

I find it just cleans up the whole page.
Thanks,
Bob

You might want to check out the Column Divider Pro.

I downloaded and installed the suggested module. Really like what it does so I have kept it on. The only thing though is that the horizontal lines I wanted under each item in a given sub-category isn't there. I did see another related module to the one you suggested , it to I'm assuming would do about the same thing.

Any ideas as to how to get horizontal lines under each item on a sub-category page similar to the new products in left sidebox.
Thanks
Bob

Oops. Mis-understanding......sorry. Gotcha' now, though. Try adding this to your stylesheet (change color as needeed):

.productListing-data {border-bottom: 2px solid #000;}
```I believe that's more like what you're looking for, right?

That did the trick. Thanks for the help.
much appreciated.