[12 PACKS IN ONE SET]You will 12 pieces of pet , which is enough for 6-12 months of daily use and replacement. High , and saving money. [COMPATIBILITY]Pet foam filter replacement is only compatible with for WF020TP Fully transparency pet water , with size of 4.7 inch x 1.18 inch x 0.63 inch (12cm x 3cm x 1.6cm). [MULTIPLE FILTRATION]This is high-density and high-content activated carbon filter, triple filtration structure to achieve multiple filtering, effectively increase water , increase oxygen content and provides your pet with cleaner and healthier water. [KEEP YOUR PET HEALTHY]The replacement foam filter effectively impurities, filter hair, chlorine, heavy metals, and odors, your pet's water clean, and tasty. Help prolong the life of your water pump. [EASY TO USE]The water are easy to remove for pump cleaning and foam filter replacement, it is suggest to change 2 to 4 weeks to maintain your pet water and keep the water and clean. Material:sponge colour:Black+white Package Contents: 12 * pet replacement Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.