Description from Amazon

This system holds 3.25 gallons and 2 Black Berkey water purification elements are included. Also bundled with this package are 2 PF2 filters. You can filter up to 4 gallons per hour. You can add 2 more Black Berkey elements (for a total of 4) which would allow you to purify up to 8 gallons per hour. The system is a beautiful high-grade polished 304 stainless steel that look great in every house. With the included black berkey filters this powerful system purifies both treated water and untreated raw water from such sources as remote lakes, streams, stagnant ponds and water supplies in foreign countries, where regulations may be substandard at best. Perfect for outdoor activities and a must in hostile environments where electricity, water pressure or treated water may not be available.

• The benefit of this bundle is that the PF2 filters are 50% off of MSRP. PF2 filters out Fluoride, Arsenic V and pre-oxidized Arsenic III, as well as other residual heavy metal ions. You simply screw the PF-2 Fluoride filter into the Black Berkey filters.
• Capacity is 3.25 gallons
• Constructed of highly polished 304 stainless steel
• 2 Black Berkey water purification elements are included (you can use up to 4)
• Filters 4 gallons per hour with 2 Black Berkey elements
• Filters 8 gallons per hour with 4 Black Berkey elements
• 23″ in height with a diameter of 9.5″
• For travel the the upper chamber nests within the lower chamber for transport and stands only 15-1/4″ in height
• So powerful, this system is able to remove food coloring from water without removing the beneficial minerals your body needs. Virtually no other system can duplicate this performance