[ Triple Filtration Filter] water filter replacement has multi-layer filtration system, high density non-woven fabric capture pets' hair and impurities, keep water clean; Activated carbon remove chlorine and odors, purify and freshen water; Ion exchange resin removes heavy metal ions, softens water quality and improve taste. [Pre-Filter Sponge]High density pre-filter sponge can further filter hairs and debris, and prevent blockages and damage to the pump, extending the life time of your fountain pump. [Warm Tips]Before replacing the filter, please soak the filter in clean water for 5 minutes and then rinse filter under running water, which will prevent carbon dust from shedding into water, keep water clean and . [Replace Regularly]To maintain the filtering effect, suggest replacing the filters and sponge every 2-4 weeks; Please change the filter and clean the fountain more often, if you have multiple pets. Colour:white+black Material:non-woven fabric Package Contents: 4 x Replacement Filters 4 x 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.