[Compatibility]Cat water fountain filters substitute set, perfectly for 84oz/2 wi-fi pet water fountain; [4 Level Filtration System]Replacement filters include four layer filtration system] Non-woven material can clear out hair and impurities, hold water clean; Activated carbon can remove bad flavor and odor, purify and freshen water; Filtration stone can get rid of heavy metals and release hint elements; Ion replacement resin may well soften the tap water, improve the taste. [Pre-filter Sponge]High density pre-filter sponge helps get rid of tremendous debris and filter out impurities, preventing them from getting into water pump, it would help to increase pump life. [Replace Filter Regularly]To preserve the filtering effect, please replace clear out and sponge each 2 weeks; Please clear the fountain and alter filter out extra often if have several pets. [Warm Tips]Before replacing the filter, please soak clear out for 5 mins and carefully rinse it for 30 seconds earlier than use, that will quit carbon grime shedding into water, hold water clean. Product Benefits:Removes impurities Colour:Photo Color Material:Polypropylene(PP) Specification: 12pcs Package Contents: 12 x Replacement Filters 12 x Pre-Filter Sponges Only the above package content, different products usually are not included. Note: Light mirrored image and diverse reveals may cause the colour of the article within the photograph just a little different from the real thing. The length allowed error is +/- 1-3cm.