MEWTOGO12 Pack Carbon Filters Compatible with Model 3 - Replacement Filters for All Litter Box to Absorb Odors Control Damp from Pets and Keep Home Fresh

These fit perfectly in my litter robot 4! They are great quality and value for money.

There is a little wedge on the LitterRobot3 where the filter is supposed to fit into, it's a little large for that but I trimmed it and it works fine to help combat the litter odor.

Love that these are affordable and fit my cat box perfectly. These are a great value!

Fit well for litter robot 4

Great price and does the job

So I have had my Litter Robot 3 for a year now and I love this thing. However, the filters are expensive for how often you need to change them. I ordered this product to save money. I was expecting the filters to be thinner than the original based on other reviews; however, they aren't as bad as the other reviews would have you believe. I pulled my old filter out that was a Litter Robot filter and had been used. I compared it to the brand new one and this replacement one was thinner but not by alot. I put in the replacement without issue - it fit perfectly. The filter is designed to help control the smell (notice I said control not eliminate). So far, this replacement filter has done just that. I've only had the replacement in for a week and so I can't say now whether it will last the full month, but I have been happy with this purchase. It controls the odor as much as the original one at a more reasonable price (still kind of pricey) even though it is thinner (but again, not by a lot).If you are trying to pinch your pennies without sacrificing a lot of quality, this is a good alternative. I noticed there were a few options out there for a cheaper price, but when you look at the specs on the other ones the thickness is less than this product. I think this is as thin as I would go to help ensure the odor control - I believe any thinner would be a waste of money. I plan to order this product again in the future when I need to replenish my stock.

We use these for our litter robot (we have 2 cats) and these strips are very convenient and cost effective. We cut them to fit perfectly and they work like a charm!

It works well

Not sure if these actually work. Using it on a robot litter 4, and still get a bit of a smell. Cheaper than there genuine filters, so expect them to be not as good.