Usage Tips:Odor-Free Living - Compatible with for Litter-Robot 4 carbon filters deliver a breath of fresh air, utilizing activated carbon's natural absorption to vanquish odors and maintain a serene home atmosphere. Precision Fit - Expertly designed, our compatible with for Litter-Robot 4 filter replacement slides in effortlessly, offering a custom fit that prevents any leakage, making maintenance both quick and satisfying. Advanced Odor Neutralization - With each compatible with for Litter-Robot charcoal filter replacement packed with dense, odor-absorbing particles, you'll experience the pinnacle of freshness in every corner of your room. Long-Lasting Freshness - These charcoal cat litter filter work tirelessly, trapping odors and ensuring a consistently pleasant environment, reducing the need for frequent changes. Optimized for Your Pet's Health - Our charcoal filter for litter box prioritizes your cat's well-being, using safe, non- materials that gently cleanse the air they breathe. Colour:Black Material:sponge Package Contents: 12 * Filter Replacement Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.