Features£º Made from high-quality foam with exquisite workmanship, can effectively remove hair and debris, dirt, and other particles in water. Not only can aerates the water for adding oxygen and freshness, also protects the submersible pump, extending service time. Broad compatibility, suitable for most water fountains, always provide fresh and clean water for cats and dogs. Please wash the filter before use, and change filters every 2 months, for the sake of pets’ health. Specifications£º Color: Black Material: Foam Product Size: 6.6 * 3 * 3cm/ 2.4 * 1.1 * 1.1inch Product Weight: 1g/ 0.03oz Note£º Please check the size before order. Package List£º 4 * Foam Filter