Filter set Suitable for cat fountain Suitable for 84oz/2.5L: ONLY COMPATIBLE WITH 84oz/2.5L PET FOUNTAIN (Filter size: 4.8 x 4.8 inches). Not compatible with 95oz/2.8L pet fountain. Please check the original model of your cat water filter before purchasing.</br> Includes: Value pack of 8 filters and a pack of 4 Pre-filter sponges. The filter and Pre-filter sponges of the cat fountain are individually wrapped and sealed to maintain high quality.</br> Material: Composed of a cotton layer, activated carbon, and an ion-exchange resin. They filter hair and heavy metals and improve the water taste, so pets can drink clean and fresh water. This is healthier than other filters with only two filter materials. Protecting your pet's health: Our filters Suitable for cat fountains ensure clean and fresh water Suitable for your pet, which helps increase water consumption and reduce the risk of urinary tract infections. Note: Rinse the filter Suitable for use with water. Replace the filter every 2-4 weeks.</br>