Odor-Free Living - Compatible with Litter-Robot 4 carbon filters deliver a breath of fresh air, utilizing activated carbon's natural absorption to eliminate odors and maintain a clean home environment. Precision Fit - Expertly designed, our compatible Litter-Robot 4 filter replacement slides in effortlessly, offering a secure fit that prevents leakage, making maintenance both quick and convenient. Advanced Odor Neutralization - Each Litter-Robot charcoal filter replacement is packed with dense, odor-absorbing particles, ensuring maximum freshness throughout your home. Long-Lasting Freshness - These charcoal cat litter filters work continuously, trapping odors and maintaining a consistently pleasant atmosphere, reducing the need for frequent replacements. Optimized for Your Pet's Wellbeing - Our charcoal filter for litter box prioritizes your cat's health, using safe, non-toxic materials that gently purify the air they breathe. Colour: Black Material: Sponge Package Contents: 12 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.