Thanks for the clarification.

 

you can get a 2 dollar rebate on your purchase for each filter. It's now cheaper for the longer filter.

http://g-ecx.images-amazon.com/image...241713693_.pdf

Oct 1,2008 - Dec 31, 2008

I think everyone here bought it during that time. It's too bad that there is a limit of 2 rebates per address.