General description The 12 Pieces Cat Fountain Sponge Filters are designed to provide clean and fresh drinking water for your pets. Each filter features a triple filter system, ensuring effective purification and maintenance of your pet's water dispenser. Technical specifications Dimensions: 11.4 × 5.7 × 1.9 cm Material: High-density sponge, activated carbon, and ion exchange resin Compatibility and accessories Compatible with WF-050 and WF-100 1.5L pet fountains Usage Rinse the filter sponge under running water before use Soak the foam filter for 5 minutes prior to installation Replace the sponge filter every two weeks in summer and every three weeks in winter