The Big Berkey Gravity Fed Water Filter System with 2 Black Purification Element Set is a high-quality water filter that uses carbon/charcoal filtration method to remove chemicals and provide clean drinking water. Made of stainless steel, this 2-stage filter has a capacity of 2 gallons and is suitable for both commercial and household use. The Berkey brand is known for its gravity-fed water filters, and this model is designed to be lightweight at 11 lbs, making it easy to transport and use in various settings. The set includes 2 black purification elements, making it a reliable and efficient choice for purifying water.