Filters for Alternative Processes

Some time ago someone, Kerik Kouklis I believe, provided a source for screening filters for alternative processes solutions. I have lost the information and can not locate the thread. Can someone point me to the information.

Sandy King

I use these with a vacuum pump:

http://www.coleparmer.com/Catalog/product_view.asp?sku=0673002

They come either with 0.2 or 0.45 micron pore size.