SPECS: Weight: 1 lb. 1 oz. Dimensions: 8.25 in. L x 3 in. W x 4.5 in. H Flow Rate: 2.5L/min Filter: 0.02-micron Advanced hollow fiber DESIGN & DETAILS: Designed to filter water in the most remote of environments, perfect for backcountry users and global travelers Filter effectively removes protozoa, bacteria, viruses, and particulate from filthy water Filter cartridge lasts up to 10,000+ liters and has a replacement indicator on it Filter self-cleans with every stroke for fast flow rates and no-hassle use Engineered for harsh environments, freezing temps, drops, and heavy use Meets: NSF protocol P248 for "worst case" water conditions