[High Density Sponge]Cat Water Fountain Filters Sponges Foams, Compatible with Multi Pet Fountain Replacement Filters for Cat Fountain<br> Safe Material: The foam filter is a new biological filler synthesized materials that is safe for your pets. You can use it worry-free.<br> Protecting the Pump: It can better filter the hair and prevent the food residue from clogging the pump and extend the life of the fountain pump.<br> Keeping Health: Clean and flowing water supply will provide your pet with clean, fresh water which is very important for their health.<br> [Recommendations]Please soak the filter in water for 2 minutes and rinse it thoroughly under running water before use and change the filter every 2-4 weeks.<br> tip: excluding pump<br> Material: foam cotton<br> colour: Black<br> Package Contents:<br> 12 x U-Shaped Filter Cotton<br> Only the above package content, other products are not included.<br> 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.