The PUR Plus Faucet Mounted Replacement RF-3050L Water Filter is a brand new white carbon block filter cartridge designed to remove contaminants such as lead, mercury, cryptosporidium, giardia, chlorine, and more. This replacement filter cartridge, model RF 3050L is ideal for ensuring clean and safe drinking water in your kitchen. The PUR brand is known for its quality water purification products, making this filter a reliable choice for improving the taste and quality of your tap water.