not mine
http://raleigh.craigslist.org/tls/2251680424.html
RIDGID AF3000 air filtration system - $100 (Hillsborough area)
Date: 2011-03-07, 10:08AM EST
Reply to: sale-eazwq-2251680424@craigslist.org [Errors when replying to ads?]
Used shop air filter. I don't have the particular specs...