Package Content: You will receive 12 pieces of cat fountain filters with triple filtration system. Sufficient amount is enough to meet your use and replacement need, providing clean drinking water to your pets. Product Size: The cat water filter sponge measures 11.45.71.9cm/4.52.240.75inch, compatible with 50oz/1.5L WF-050 and WF-100 clear pet fountain. Please confirm the size before buying. Premium Material: The pet fountain sponge filters are made of high density sponge,activated carbon and ion exchange resin,soft and reliablematerial,offeringbetterwater purification effectfor your pet. Filtration Function: With high density and high-content activated carbon, this pet fountain filters can effectively filter hair, dust, heavy metals and other impurities. Keep your pet's water clean and fresh. Warm Tips:Please rinse thecat fountain filter spongewith water flow before use, soak the foam filter for 5 minutes and it is betterto replace the sponge filter every half a month in summer and every three weeks in winter. Specification: Color: blackand white Material: sponge Product Size:11.45.71.9cm/4.52.240.75inch Package details: 12x pet fountain sponge Note: Due to manual measurement, the size and weight may have a certain error. Due to the difference between different monitors, there may be a slight color difference existed. Specification: Color: blackand white Material: sponge Product Size:11.45.71.9cm/4.52.240.75inch Package details: 12x pet fountain sponge Note: Due to manual measurement, the size and weight may have a certain error. Due to the difference between different monitors, there may be a slight color difference existed.