PCV breather filter size...

Well since im gettin an intake from ebay..( i already placed a bid) anyways i also looked in ebay for the breather filter. There was a 12mm and 9mm. Is that the size of the filter itself or is that the size of the hole where you can attach it to?. Btw it says its universal

If your buying that civic intake you showed in the prevous post, you will not need the breather filter..that blue wire will attach right onto it then on the intake...but when you install it... get your self a can of throttle body/carburator cleaner becuase your TB will be all black from the PCV valve...

well i bought this one

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=7932844735&ssPageName=ADME:B:EOAB:US:6

well thanks for all your help

you are still going to need the 45 degree rubber 3" elbow... and when you mount it securly, you might need 1 bolt and nut... but its not rocket science so you should be able to figure it out...