Ensure your pet's water is clean and fresh with the Dogness D12 Ultra Filtration Layers Filter 3pcs in White. These filters feature advanced ultrafiltration technology, effectively removing impurities as small as 0.01 microns with a 99.99% sterilization rate. Designed for the D12 infrared sensing/rechargeable pet water fountain, each box contains 3 filters for convenient replacements every 3-4 months. Keep your furry friend healthy and hydrated effortlessly.