AMK Rapid Pure Trail Blazer Gravity Water Purifier Perfect for the camp site this gravity purifier allows you to filter water at an ultra fast 5 liters per minute. The fastest flow rate of any gravity purifier on the market this system uses no batteries, pumping, priming or special maintenance. This water filter also removes 99.99% of viruses, bacteria, Parasites and sediment and even works after being frozen. Features: - Gravity Water Purifier - Removes Viruses And Other Contaminates Specifications: - Capacity: 9 Liters - 4.1 Liters Per Minute Flow Rate - Weight: 18.5 Ounces