Odor-Free Living - Compatible with Litter-Robot 4 carbon filters deliver fresh air by utilizing activated carbon's natural absorption to eliminate odors and maintain a clean home environment Precision Fit - Expertly designed, our Litter-Robot 4 filter replacement slides in effortlessly, providing a secure fit that prevents leakage, making maintenance quick and easy Advanced Odor Neutralization - Each charcoal filter replacement is packed with dense, odor-absorbing particles, helping to keep your room consistently fresh Long-Lasting Freshness - These charcoal litter filters work continuously to trap odors and maintain a pleasant environment, reducing the need for frequent replacements Optimized for Your Pet's Health - Our charcoal filter for litter box supports your pet's well-being with safe, non-toxic materials that help purify the air Color: Black Material: Sponge Size: Thickness: 10mm Package Contents: 6 x 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 to appear slightly different from the real thing. The measurement allowed error is +/- 1-3cm