Katadyn Expedition Filter
"The best microfilter for large groups and relief organizations. Ideal for outfitters, base camps and expeditions. Exclusive silver impregnated ceramic element lasts up to 26,000 gal. Durable stainless steel design. Microfiltration method: field-cleanable 0.2 micron ceramic depth filter. Output: approx. 1 gal./minute. Weight: approx. 11.5 lbs. Height: 23"". Includes: prefilter, carry bag, measuring gauges and cleaning pad. "