[PERFECT MATCH]The water filter is compatible with 100oz/3L Pet . With sponge filter for the pet water pump. Keep Water Lasting : Exchange resin remove and calcium in water, and it is made into pet-friendly water (soft water) whose hardness is lowered; High performance activated carbon absorbs odor Easy To Use: Rinse the filter with water thoroughly use, and replace it regularly (depending on the frequency of use). [PREMIUM ]Each pet filter is composed of activated carbon, exchange resin and non-woven fabric. They can filter hair, heavy metals and the of the water so that pets can drink clean and water. [Recommendations]To prevent the activated carbon dust (caused by long shipping and will not harm your pets) from shedding into the water, please the filter in water for 2 minutes and rinse it thoroughly under running water use. color: White Material: Cotton Package Contents: 12 x Water Filter Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.