Odor-Free Living - Compatible with Litter-Robot 4 carbon filters deliver fresh air using 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 material, helping keep your room smelling fresh Long-Lasting Freshness - These charcoal filters continuously trap odors, ensuring a pleasant environment and reducing the need for frequent replacements Optimized for Your Pet's Health - Our charcoal filter helps improve air quality by using safe materials that gently clean the air your pet breathes 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. Measurement error allowed is +/- 1-3cm