SeedSpring Water Nano-Filtration Purifier is the only water purifier in the USA to be made of pure hollow fiber nano-filtration membrane through independent research and development. Food-grade raw materials imported from Germany are used to create the membrane for cross flow filtration. The nano-filtration aperture is limited to 1-10nm so that good mineral substances can be retained in the filtered water. All toxins including viral, bacterial, and organic matter that are larger than 10nm in diameter are retained in the interior wall of the membrane which are automatically cleansed while tap water is in use. There is no need to replace the filter core during typical use. By using the SeedSpring Water Nano-Filtration Purifier, ordinary tap water is converted to safer, healthier water for drinking and use at home. The SeedSpring Water Nano-Filtration Purifier is available in different sizes and models to suit your actual needs – whether it be end-point filtering in your kitchen, or commercial filtering for your business.