【Pre-Cut to Fit】This HQRP activated carbon filter sheets are custom designed replacement for Litter-Robot 3 models and provide high absorption and great filtration performance. In addition, this carbon pre filter is non-toxic and odorless, environmentally friendly, and safe for pets. 【Pack of 12】 We offer 12 carbon filters that can replace according to your cat's usage patterns. For optimal odor absorption, we recommend changing the carbon filter every month. So that your litter box filter system will last about 12 months. This is not an Original Equipment Manufacturer (OEM) product, HQRP branded product is a replacement. All brand names and logos are registered trademarks of their respective owners. Any use of the brand names or model designations for this product are made solely for purp.
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