INCLUDES: Big Berkey stainless steel housing (Upper, Lower & Lid), 2 Black Berkey Filters, 2 Fluoride Elements, 2 Hole Plugs, 1 knob, 1 easy flow spigot, and 1 set of easy to follow assembly instructions. When drinking water that’s been filtered using a Berkey purifier, you can rest assured that your water is clean and safe for consumption. In fact, Black Berkey purifier elements are far more powerful compared to competitors’ water filters. When tested Berkey water filter elements removed 100% of pathogens, allowing them to be classified as purifiers rather than simply filters. The included two (white) Berkey fluoride filters attach to the bottom of the Berkey Purifiers and hang in the lower chamber. Berkey fluoride filters reduce the amount of fluoride in your water UP TO 95%. Each Fluoride filter has a lifespan of 1,000 gallons and each purifier can filter up to 3,000 gallons. The Big Berkey is constructed from High Grade 304 Stainless Steel, and can accommodate up to four Berkey Purification elements and four Fluoride filters, however only two of each are included with this package.