General description You will get 12 pieces of cat water fountain sponge filters featuring a triple filter system. This quantity is sufficient to meet your usage and replacement needs, ensuring your pets have access to clean drinking water. Technical specifications Product Size: 11.4×5.7×1.9 cm Compatible with: 1.5L pet fountain WF-050 and WF-100 High Quality Material The pet fountain sponge filter is constructed from high-density sponge, activated carbon, and ion exchange resin. This soft and reliable material enhances water purification for your pet. Filter Function These pet fountain filters, with their high density and activated carbon content, effectively filter out hair, dust, heavy metals, and other impurities, keeping your pet's water clean and fresh. Usage Before using, rinse the filter sponge with running water and soak it for 5 minutes. It is recommended to replace the sponge filter every half month in summer and every three weeks in winter.