The lightest, most compact filter on the market. Small size fits into coat pocket or waist pack. Ideal for travel and day hiking. Exclusive silver impregnated ceramic element lasts up to 2000 gallons. Specifications: Microfitration Method: Field-cleanable 0.2 micron ceramic depth filter Output: 0.5 quarts (0.5 l)/ minute Cartridge Capacity: Up to 2000 gallons Weight: 8 oz. Height: 7" Includes: Prefilter, Bottle Clip, Carry Bag, Measuring Gauge and Cleaning Pad Katadyn