Four-stage filtration softens water quality, completely purifies and improves taste: four-stage filtration system, 24-hour uninterrupted circulation filter layer by layer to intercept various impurities and protect the health of pets. Supplier of high quality food grade filter element raw materials, filter raw materials and food grade water storage raw materials purchased from all over the world, so that pet water dispensers can purify fresher and better water. Coconut shell activated carbon is born with well-developed micropores, which has strong gas adsorption ability harmful Ion exchange resin: it can replace hardness ions such as calcium and magnesium in the water to soften the water quality Material: fabric non woven + ABS resin + ac carbon coconut tif + ion exchange resin Dimensions: 59x42x22(mm) Instructions: In order to ensure a better filtering effect, the filter element should be replaced once a month. The filter element must be cleaned with water before use.