The BB9-2 black filter is made from high-grade activated carbon rod reduces contaminants such as inorganic minerals, heavy metals, silt, sediment, chlorine, sand, rust, odor and large particles in water from nature.The PF-2 white Filter is made from Nature Coconut activated carbon and activated alumina granular effectively remove fluoride and arsenic and other residual typical heavy metal ions.We recommend you replace PF-2 Fluoride Water Filter every 1,000 gallons and 6000 gallons for BB9-2, under normal conditions. Get better and safer water with less money.Colour:black+whiteMaterial:Alumina + activated carbonPackage Contents:1set x for berkey fluoride filtersOnly the above package content, other products are not included.Note: Light shooting 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. When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specifications We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please don''''t hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it