【Perfect Fit】Pre-filter sponges are perfectly compatible with wireless pump water fountains 3 Pro/ Solo 2/ Solo SE/ MAX. Replacement foam filters for 67oz/2L, 65oz/1.85L, 56oz/1.6L & 101 oz/3L pet fountain,Please check your dog & cat water fountain model before purchase 【Excellent Adaptability】Fits model W300 & W500 pump 【Easy to Install】Cat water fountain filter sponge are easy to maintain for long time use. Size of filter foam:1.57 x 1.18 x 0.39 inch. Enjoy a more cheerful life with your fur babies with our high-quality foam filter 【Safe Material】Made of premium foam, cat water fountain filter replacement around the pump can filter impurities better and prolong the service life of the pump, keeping the water clean and your pet healthy all the time 【High Density】Pet water fountain filter replacement help to filter hair and prevent food residues from entering the water fountain pump. Effective hair and debris collecting protects both the pet fountain pump replacement and your fur babies 【Better Performance】Please soak the water filter in water for 3-4 minutes before using it. And replace foam filters for cat water fountain every 2-4 weeks Brand names and/or trademarks are used here only for product description or identification of devices and/or device types Brand names and/or trademarks are used here only for product description or identification of devices and/or device types 16 Pack Replaced Foam Filters Compatible with 3 Pro/Solo 2/Solo SE Wireless Pump Pet Water Fountain