[Perfect Compatibility]- The replacement cat fountain filters are ONLY compatible with 84oz Dockstream wireless cat water fountain models PLWF005, PLWF115, and PLWF105.(Filter size: 3.78 x 2.28 x 0.39in | Sponge size: 1.37 x 1.18 x 0.35in). [Premium 24 Pack Filters + 24 Pack Sponges]- Package includes a 24-pack of premium pet fountain replacement filters and a 24-pack Replacement Pre-filter Sponges. Each set is individually packaged and sealed to maintain . [4-Layer Vertical Filtration]- 1. Ion exchange resin removes heavy metal ions and softens water quality 2. Activated carbon eliminates odors 3. The non-woven fabric captures impurities and cat hair. 4. The built-in pump sponge further filters debris to prevent blockages and damage. [Replace The Filter Regularly]- Every drop of water is filtered through multi-layer filtration to remove all contaminants and offer oxygen-enriched, better-tasting water. To preserve the filtering effect, It's recommended to replace the filters every 2-4 weeks. If you have multiple pets, please clean the fountain and change the filter more often. [Optimal Usage] - Please soak the filter for 5 minutes and rinse for before using to prevent the activated carbon dust, which 't harm your pets, from shedding into the water. Colour:white+black Material:non-woven fabric Package Contents: 24 x Replacement Filters 24 x sponge