The PUR Genuine PPF900Z Replacement Pitcher Filters come in a 4-pack, making it convenient for households to have clean and safe drinking water. These filters are designed to remove lead contaminants using a carbon/charcoal filtration method. Made of plastic material and with a capacity for water filtration, these genuine PUR filters are compatible with PUR brand pitchers and are suitable for household use. The blue filters are easy to install and help ensure that the water is pure and free from harmful substances, making them a reliable choice for clean and refreshing water at home.