Product review (1 stars): Be careful of the seller you choose
I bought these a year ago and they were as expected, I do not know the seller that filled the order.. I re ordered  this year (2011), I did not get the same product, as the order was filled by a different seller. If the seller is  FILTER  NOW, they are knock offs and do not perform well.  Although they are the correct size, the wick does not absorb water for evaporation.  I suggest you not buy from this seller no matter the price