Compatibility : Compatible with 71oz/2.1L Capsule Pet Water Fountain PLWF002. Please check your fountain model before purchase. Package: Individually packaged and sealed to maintain , making the correct choice for your filtration needs. Material : The pet fountain filter is composed of high-density fabric, activated carbon, and an ion exchange resin. They can filter hair, heavy metals, and improve the taste of the water so that pets can drink clean and fresh water. Note :Rinse the filter with water before use, clean the filter every time you change the water of the cat fountain, and change the filter and sponge every 2-4 weeks. Product Benefits: Removes impurities Colour:Photo Color Material:Activated carbon, resin Package Contents: 12 x Replacement Filters 12 x Pre-Filter Sponges 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.