QUEARN 12 Pack Carbon Filters Compatible with Model 4, Cat Litter Box Filters Replacement to Absorb Odors Control Damp from Pets and Keep Home Fresh

I grit this to go with my whisker robot litter 4. Fits perfectly. Keeps smell down. Reminds me to do a good box cleaning. Best litterbox I have ever purchased and these are great to help it run smoothly

I was skeptical in buying these because of the mixed reviews but so far I have not had any issues. At first, I thought it was not helping with the smell but after a day, I noticed that the smell was gone and that it actually was working. The filters are not thick but they do the job, which is why I must say they will need to be replaced more often than the originals. They were easy to install and the size was perfect for our litter robot 4. I would say the quality is obviously not like the original brands but you’re getting a pack of 8, so I’d say it’s worth it.

These are great for the litter robot 4! Easy to install, durable, perfect size to fit. A great value compared to litter robot brand! Will order again.

These replacement filters fit my Littter Robot 4, but they are much thicker than the originals. Keeping that in mind, I haven't had any issues with them popping out from under the frame, nor causing any issues. I do replace the filter in 2 robots every month, a 12 pack will last me 6 months. Yes - these filters make a big difference in smell and dust so do change them monthly!!

These fit my LR4 perfectly, however I don’t feel like they last as long as the OEM version so you have to replace them more frequently.

These filters work really good. As good as or better than the original. They fit perfectly are easy to install last a long time. They are the perfect thickness and are very durable.

My cat takes diabolical level s**** from a slow food change and these really do help the litter robot. Idk how this compares to the og ones because I’m too cheap for that when these work great for the price.

Bought these for me Litter Robot 4 and they fit perfectly. They do come packed tightly together so make sure you're only grabbing one instead of two, otherwise it won't fit in the compartment.