[Compatibility]perfectly for 2.2L/73oz stainless steel pet water fountain; [ Triple Action Filter]Pet fountain filters come with 3 layer filtration system. High density cotton layer, coconut shell activated carbon and ion exchange resin, they can filter hairs, debris and heavy metals, and improve the taste of the water. [Pre-filter Sponge & 8D Filter Sponge]High density pre-filter sponge can further filter out impurities, fully leverage the filtering effect; High density 8D filter sponge can filter impurities, preventing them from entering into pump, it can help extend pump life. [Easy to use]We advise you to replace filter and sponge every 3-4 weeks to keep the water clean; Please change them more often if you have multiple pets. [Warm Tips]Before replacing the filter, please rinse filter 3-5 minutes thoroughly with drinkable water, which will prevent carbon dust from shedding into water, keep water clean. Product Benefits: Removes impurities Colour:Photo Color Material:Polypropylene (PP) Specification:5Set Package Contents: 5 x Filter 5 x Sponge 5 x 8D Sponge Specification:10Set Package Contents: 10 x Filter 10 x Sponge 10 x 8D Sponge Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Product Notes: Please allow a little manual errors.Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please confirm acceptance before ordering. About Shipping: Please ensure your shipping informations are correct to avoid delivery issues. All orders are shipped within 3 days after payment. Delivery usually takes 8–12 days, The specific delivery time is depend on circumstances. If you have any questions during your purchase, feel free to contact us. We will respond you within 24 hours.