i bought them for one of those canister filter but ...
934671
i bought them for one of those canister filter but the filter didn't keep up with the turtles.  i used them in a bottle filter with a powerhead and it cleaned the 20 gallon turtle tank in a few hours.
311394
I believe it's necessary to let everyone know that there are only 3 individual filters in the box, not 3 sets as the description says.  I purchased this as a replacement for the standard filters that I normally use and because they were cheaper and another review said they would work I figured I'd try it.  However, these were not a direct replacement (at least not right out of the box).  I was able to get these to fit by cutting off some of the bottom and then they were able to fit, so I was able to use them.  The life of these lasted less than a month, but as another reviewer stated, the wicks are a necessary evil.
25643
They were good filters but the opening was too small for my hose.  I cut the opening larger and used a rubber band to put the filter on the end of my hose.  I have to take it off and let it dry each time I use it and then clean lint out of it.  I guess it depends on whether you want to bother with this or not.
1028793
They work as filters around the motor of my Drinkwell Pagoda Fountain. Not much to say besides that. :)
3231642
These just don't fit into my refrigerator. I have a Samsung RFG237AARS purchased in October 2013. The owner's manual specifies the FA29-00003G filter. I have gone through several in the last almost two years so I am aware how to install them, etc.  The latest batch, however is sized differently. Specifically, the larger portion of the neck that connects the filter (the part with the larger of the two O-rings) is 2/10" wider on the new filters than on the old one (same part #) I am trying to replace.  Given this "neck" is supposed to fit snug with its O-ring forming a seal, 2/10" is a huge difference.  To their credit the vendor, Appliance Cove, gave me a refund.
2452292
They are the only filter that fitted my AC unit.  The ones you can buy from Lowes of Home Depot are almost too big
4212525
These filters turned out not to be the right size for my coffee maker. I'm not sure how I made that mistake, and feel the ad was not quite clear. Be careful when ordering!
4040516
These bags filter fine, but I was noticing an odor that seemed to never go away while using these bags. I cleaned every filter in the vacuum, and still noticed the odor. Switched to the Hoover Type Y Carbon HEPA, and the odor is gone! I think these bags are fine, but I highly recommend checking out the carbon bags if you're having a problem with strange vacuum odors...
4441480
It shows two filters, I only got one
It says they are dirt devil brand, they ain't
AND to top it off, it doesn't fit well enough in the vacuum to create decent suction
845941
I'm not sure how effective these filters are in my Cuisinart Coffee maker but I use them anyway.
671024
It works fine so I was going to give it a five-star rating. But then I found a 3-pack filters here for about $34 and it works the same. So I removed one star from this one.
1752842
Its only $10 so that makes it ok.  It does not work correctly with cascade canister filters.  I could have made it work but it would have been ugly. Luckily I have tons of fish supplies and using an old aqueon hob for a ten gallon and a few attachments from other products I was able to rig something up that will work.  It was too short for the 29 gallon anyway so this will be better because I won't have to sacrifice my intake now.  Its another piece of equipment but that's ok for now.  The glass lily would have been much better solution and I will consider upgrading in the future.
4534750
These are replacement filters and they do their job well it seems.
4863222
I have used these filters before on larger shop vac models. When I  read the reviews, they said it came with a ring, a plastic ring that holds the paper filter in place. Well it doesn't fit my smaller diameter foam filter.  I used some large rubber bands instead, it worked fine.
166401
They are a little long for my Omni. I have to shave each one by about 1/8 inch to enable complete tightening of the filter holder
3002771
I tried and tried and I couldn't get this filter to fit on my fridge.  After comparing it to the one I was taking off, I have a take a knife to it to whittle off a piece on the locking mechanism -- then it fit.  Other than that, I thought it tasted a little plasticy on the first couple of cups out of it.  Overall, though, I thought it gets the job done and saves a few bucks in the process.
1581445
I thought these bags were for my 4.5 gallon Stanley shop vac but they don't fit.