4"X4" window. What to replace it with?

[SarverSystems]

<edit> the window is 6"X8"</edit>
I've got a case that has a small 4"X4" or so window in the top. I want to replace it with something, but I'm not sure what. Any suggestions?

I thought about mirror. Nah.
I thought about mesh screen. Nah.
I thought about a 120mm fan. Maybe.

 

[Drakan290]

140mm fan?

 

[500sd]

a fan, or some type of acrylic. fan would help more.

 

[Markistehnamezor]

4" is smaller than a 120mm fan by .75", if you do want a fan put a 100mm fan there.

 

[SarverSystems]

I was going by memory when I posted the dimensions, and I was wrong. The dimensions are actually 6"X8". It's the top window in this case: http://c1.neweggimages.com/NeweggImage/productimage/11-146-044-18.jpg

I won't be needing another fan because I am planning for 5 120mm fans to be installed in it already, plus the 120mm in the PSU. That's a total of 6 120mm fans...more than enough!

 

[Markistehnamezor]

even better! you should use a 250mm fan!

 

[Logan321]

Put a subwoofer in the hole... line your case with wood, and presto, PC Sub.

*not responsible for any data lost due to proximity to subwoofer speaker magnet*