Zen Water Systems CR-F Micro-Ceramic Filter Pore size of 0.2 to 0.5 micron (human hair is 40 to 300 microns) Traps dirt, sediment, contaminants, debris, cysts and bacteria Life of filter is 1,000 gallons or 1 year, whichever comes first Approximate flow rate of 1 gallon every 1  hours Guaranteed to fit across all Zen Water models; Be sure to use only genuine Zen Water replacement filters for optimal performance