[COMPATIBILITY]: These replacement filters are compatible with Lite Pet Water Fountain 2.5 L and Premium Smart Pet Drinking Fountain 2.5L. [CLEAN AND FRESH WATER]: The three-layer filtering system, composed of coconut shell activated carbon and cotton, helps capture hair and debris, remove odors, chlorine, and impurities from water, providing cleaner and fresher 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 THE FILTER REGULARLY]: Replace the filter every 4 weeks in summer and every 4 to 6 weeks in winter. Replace more frequently if multiple pets use the fountain. [FILTERS QUANTITY]: 6PCS [COLOUR]: White & Black [MATERIAL]: Carbon fiber [PACKAGE CONTENTS]: 6 x Replacement Filters 3 x Cylindrical Sponge 3 x Rectangular Sponge 3 x Circular Sponge Only the items listed are included; other accessories are not included. Note: Due to lighting and monitor settings, the actual color may vary slightly from the image. Measurement may vary by up to +/- 1-3 cm.