Description: Package Included: Every package includes 30x filters, which can be used long time. Quality Material: Made of high quality Sponge material, to achieve multiple filtrations, and effectively maintain water quality and the health of pets. Keep Pets Healthy: The filters remove hair, debris, chlorine, odors, and contaminants from the water, keep the water tasting fresh, making pets fall in love with drinking clean water. Easy To Use: Rinse the filter thoroughly with water before use, to remove excess and scattered dust, thus providing clean water for your pets. Simple to Replace: To keep the water clean, you need to change the filter every 2 to 4 weeks. If you have more than one cat dog, you need to adjust the frequency to ensure that healthful & clean water is always available for your pets. Specification: Material: Sponge Size: 3inchx2.7inchx1.15inch Package Includes: 30 Filters Note: Please allow slightly errors due to manual measurement and different monitors.