It consists of cotton, activated carbon and ionic resin. They filter hair, heavy metals, and improve the taste of water, so pets can drink clean, fresh water. Features: Perfect Match:Filter Size is 14.614.6cm, the diameter of inner circle is 3.3cm. Compatible with ADVWIN 2L Pet Fountain and fit for other same size of pet fountains as well, please double check the size before purchasing. Premium 4 Pack: 4-pack of premium pet fountain replacement filters, individually packaged and sealed to maintain high quality. Keep Your Pet Healthy:The filter uses plastic as the bottom shell, composed of cotton layer, activated carbon and ion exchange resin. They can filter hair, heavy metals, and improve the taste of the water so that Let your pet drink clean and healthy water. Recommendations:To prevent the activated carbon dust (which will not harm your pets) from shedding into water, please soak the filter in water for 2 minutes and rinse it thoroughly under running water before use. Replace:Rinse the filter with running water every time you change the water of the fountain and according to your pets drinking frequency and the number of pets using the fountain, change the filter every 2-4 weeks. Specifications:Product Diameter: 15cmQuantity: 4 PCSMaterial: Activated Carbon Filter Ionic ResinReplacement Cycle: 15-30 days Package Content:4 x Filters
