Which carbon filter for a 4in 165 CFM fan?

Can someone please recommend a carbon filter for a 4in 165 cfm fan?

my set up is this:

4in fan -> 4in ducting -> 4in to 6in reducer -> reflector -> 6in ducting ->carbon filter

However, i dont know which carbon filter to get?

thanks

12" phresh filter


http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=220528444422&rvr_id=&crlp=1_263602_263622&UA=WXF?&GUID=b486222a1280a0aad2007630feeccedd&itemid=220528444422&ff4=263602_263622

Touchet said:

12" phresh filter


http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=220528444422&rvr_id=&crlp=1_263602_263622&UA=WXF?&GUID=b486222a1280a0aad2007630feeccedd&itemid=220528444422&ff4=263602_263622

Click to expand...

rated at 200CFM, will my 165 CFM be ok?

yup, sure will, your within 50 so your good. Is that fan axial , squirrel cage, ??

Alot of seller on ebay have 4 inch carbon filters, I found a new one, just like the phresh filter, for less than $30. Do an ebay search for the seller xcceries or auction # 230474589637

Here's a link 4" Carbon Filter HTH, S