I bought these for my stainless steel fountain for my cats. It fits perfectly into the fountain. The only drawback is that it needs to be changed every two weeks, so it can get pricey. However, it's nice that I can purchase this online for a quick easy purchase.

These are awesome. Aside from the fact that we love our cat fountain and these are the only filters we've found that fit it, they just plain work really well. They continue to do their job even when we are sick and forget to swap them out - which is above and beyond.

Fountain filter replacement pack comes with 3 new filters. Works in all pet foundations using the picture filter. It is a 3 layer system that helps keep the water fresh and clean. It caputres all the debris and hair your pets drop in there while drinking. Make sure you rinse out the filters before use.