1. Replacement Period: Carbon filter needs changing every 2 to 4 weeks while foam filter needs cleaning every 2 to 4 weeks and replacing every 2 to 4 months for better water quality, mainly depending on water condition and the number of pets. 2. Dual Filtration System: The carbon filter helps purify the water and odors, while the foam filter blocks out any hair, dust or food debris. 3. Health and Safety: Made of and non- materials, the filters help the water quality and provide healthy and water to protect your pet's health. 4. Replacement for Tritone and Fiumi: This replacement filter is specifically for Tritone and Fiumi Ceramic Pet Water Fountain, suitable for or cats of all sizes. The package includes 8 carbon filters and 2 foam filters. 5. Kind Reminder: Before the replacement, rinse the filters with clean water, and it is better to have a constant and sufficient supply of filters to the water quality. color: White Material: Activated carbon Package Contents: 8 * Activated carbon filter 2 * foam filter Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.