The Berkey Fluoride PF-2 Water Replacement Filters Systems Filter Authentic System is a 2-stage gravity filtration water filter designed for commercial and household use. Made of BPA-free polypropylene material, this white filter is compatible with Berkey filters and has a capacity of 1 gallon per filter. It effectively removes fluoride contaminants, making it suitable for producing clean and safe drinking water. With easy installation and reliable filtration, this Berkey PF-2 filter is a convenient and efficient solution for water purification in various settings. Sealed, Bran New • We ship within one business day. • All items come from a pet-free, smoke-free home. • Please compare the measurements in the images or description below to something you already own.