Product Description Triple Filtration for Water Healing Guard one: high intensity cotton Resting on the ground, hair, dust and others small impurities can easily fall on the fountain. With the highest intensity cotton, our fountain filter can effectively filter hair, breakage and sediment. Guard Two: activated carbon coconut Made; & agrave; from natural coconut shell, removes residual chlorine and other infectious microorganisms. Purify drinking water and further improve taste, which most intrigues our animals & rsquo; s interest in drinking. Guard three: ion exchange resin Drinking tap water without treatment can build up calcium and magnesium ions, causing calculus problems in our pets. Ion-changing resin helps extracting heavy metal ions, softens tap water and protects health urinary of our animals. Please measure the dimension before purchase! Outside diameter 125 MM Inside diameter 37 MM Generated; generally adapted; & agrave; the fountain & agrave; 2.0-2.5L cat water, eg Aerb,