Thank you for taking a look. any other offers please message me. this is a four pack capsule replacement filters. brand new in the box. many units available .The PETLIBRO Capsule Replacement Filter 4 Pack is designed specifically for use with the PETLIBRO Water Fountain. Made of white plastic, this filter pack includes four filters to ensure your pet always has clean and fresh water. Compatible with the Fountain PLWF002, this filter is easy to install and helps keep your pet's water pure and healthy.