Constructed of highly polished 304 stainless steel, the system comes complete with two purification elements and utilizes the latest technological advances. This system has a storage capacity of about 4.5 gallons (17 liters) and when in use it stands 25.75” in height with a diameter of 10”. The upper chamber nests within the lower chamber for transport and stands only 17” in height. Purification Elements are more powerful than any other gravity filter element currently available. The micro-pores within the cleanable Black Berkey™ purification elements are so small that pathogenic bacteria are simply not able to pass through them.