[Compatible with multiple models]Compatible with for our 108oz/3.2L and 67oz/2L Stainless Steel Cat Water Fountain(More compatible models: PLWF003)[Replace Regularly]Pet water fountain need to replace the carbon filter every 4 weeks.(The hot weather breeds mosquitoes, please replace the carbon filter once 2 weeks), and replace the foam filter every two months to keep the water fresh.[Quantity specification]Set of 8 filters and 8 sponges compatible, easy replacement, bringing more protection to your pet.[Three-layer filtration]First Filter,Block Hair and Debris,Middle Filter,Remove Residual Heavy Metals,Third Filter,Healthier, High-quality Flowing Water,Allow pets to drink clean, fresh water throughout the day.[Matters needing attention]Soak the lter in a clean bowl for 5 minutes Notes, The lter must be fully soaked before the fountain is turned on Otherwise, the water may not diuse through the lter and cause overow,Do not soak the lter in the fountain tank to avoid dust on the surface.Material:spongecolour:white and blackPackage Contents:8 x filter elements8 x filter spongesOnly the above package content, other products are not included.Note: Light 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.