Design for NICREW cat water fountain 2L (can be found at amazon.co.uk by searching "B09J7Z6JJF"). Please use NICREW official replacement kit for your fountain for optimal performance

Set of 4, each piece is individually wrapped to help store and use easier, each made of high density cotton, activated carbon and ion exchange resin

Cotton outer layer works to catch larger particles, such as pet hair and food, activated carbon and exchange resin can effectively remove contaminants and bacteria from drinking water

To maintain the highest quality of water, it is recommended to replace the filter every 2 - 4 weeks. More frequent changes are necessary due to indoor environmental and water conditions, as well as multiple pet use. This kit is enough to keep the water fresh and clean for 2 to 4 months

Always soak new filter at least for 10 minutes in clean water before installing it into the fountain. If you need any help, just feel free to contact us