[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. Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. 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 make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!