WE HAVE EVERY FILTER, EVERY SIZE! ORDER ONE FILTER, GET THE SECOND FILTER FREE Order a 2 pack, a 4-pack, a 6-pack or any quantity. As soon as we get the order we will deduct the cost of one filter. This offer is for first time customers only. Only one free filter per customer (per address). Place your order, then  write "free" in the comment section of the shopping cart.  If you forget to write free, simply send us an email.