Product review (5 stars): Great price - Great product
Exactly like the originals.  Fits perfectly.  Bought extras.  These are very easy to maintain but that is the key, you have to maintain them, i.e. wash them at least once a week, then you would rarely have to replace them.  Unfortunately I didn't do that so I had to purchase new ones and as I say, exactly like the originals, great price, and great service.