[COMPATIBILITY]: These replacement filters are compatible with the Lite Pet Water Fountain 2.5 L and the Premium Drinking Fountain 2.5L. [CLEAN WATER]: The three-layer filtering system, composed of coconut activated carbon and cotton, helps capture hair and debris, remove odors, heavy metals, and impurities from water, providing purified drinking water for pets. [FRIENDLY REMINDER]: Rinse the filter thoroughly under running water and soak it in water for 15 minutes before first use. Ensure the filter is inserted in the correct direction during replacement. [REPLACE FILTER REGULARLY]: Replace the filter every 4 weeks in summer and every 4 to 6 weeks in winter to maintain clean drinking water. Replace more frequently if multiple pets use the fountain. [FILTERS QUANTITY]: 12 PCS [COLOR]: White & Black [MATERIAL]: Carbon fiber [PACKAGE CONTENTS]: 12 x Replacement Filters 6 x Cylindrical Sponge 6 x Rectangular Sponge 6 x Circular Sponge Note: The package includes only the items listed above. Other products are not included. Note: Light reflection and differences in display screens may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.