Colour:8 Pieces. Product details: Material: cotton and activated carbon and coconut shell Compatibility: 43717, 43715, 43716, 43718, 43751, 43722 cat troughs Product size: 8.4 8.4 cm. The package includes: cat fountain filter 8 pieces. Note: 1. The cat drinking fountain filter must be soaked in water for 15 minutes before use and rinsed out. 2. It is recommended to replace the filter of the water dispenser every 30 days. 1. Perfect fit: this cat water filter is only compatible with 43717/43722/Pixi 2.5L drinking cats. Please note the size and shape of the filter when ordering. 2. High quality material: this filter cat fountain uses double filtration and a high density cotton layer to filter hair and other sediments. 3. Efficient protection: activated carbon and ion exchange resin help you filter out most impurities and heavy metals while removing odours, making every drop of water cleaner and healthier. 4. Easy to replace: rinse the filter with water before replacing and replace the cat filter drinker every 30 days, so your pets can drink healthy water for a long time. 5. Please note: soak the cat fountain filter in water for 15 minutes before use and then rinse it out to prevent surface dust from falling into the water. 1. Perfect fit 2. High quality material 3. Efficient protection 4. Easy to replace 5. Please note