Welcome to ShenMo shop! Material: Replacement filter made of premium activated carbon with strong absorption capacity which can absorb and filter odors for a long time. Do not rinse before use Size: The size of the carbon filters is 16cm 16.5cm, and the thickness is 1cm, you can cut them to any size you want. Suitable for: Odor filters fit well on dome litter and most other cat litters of different shapes, help eliminate litter odors KEEP THE AIR FRESH: Odor filters solve the litter box unpleasant odor problems, do a good job of eliminating odors, keeping odors fresh and clean, keeping your pets healthy and happy, make you live a happy life with your pets Package Included: You will receive 4 replacement cat litter filters, and it should be replaced every 2-3 months. Sufficient quantity to replace 100% satisfaction - Our customers are our priority. If you find any problems with the products after receiving the goods, such as damage and incorrect quantity, please contact us immediately. We do our best to provide you with satisfactory after-sales service.