Compatible: Our replacement filters are compatible with FOR Dockstream Cat Fountain PLWF005/PLWF115/PLWF105 for and performance. Let your pet always get the best drinking experience. Triple Filtration: The pet fountain filter contains activated carbon, ion exchange resin and non-woven fabric to remove odors, remove heavy metals and soften water. Pre-filter sponge: High-density sponge filters debris and pet hair, preventing pump clogging and damage and extending the life of your fountain pump. Warm Tips: Please immerse the filter in water for 2 minutes and rinse thoroughly before use to prevent carbon particles from seeping into the water and your pet enjoys clean and fresh water. Regular replacement: In order to maintain the filtration effect, it is recommended to replace the filter every 2-4 weeks. If you have multiple pets, consider shortening the replacement cycle. Material: non-woven fabric colour: As Shown Package Contents: 36 x filter elements 36 x sponge filter 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.