[High Contaminant Rejection] Remove up to 97% of total dissolved solids from water. This membrane is only 0.1nm, 50 times smaller than even metals. So these RO membranes can easily remove heavy metal, harmful minerals and other soluble salts from water. Enjoy Your Water with Confidence! Two ends can be conveniently opened to fill the filter, and can be used repeatedly, very affordable. Thick filter housing design, filter cover seal design ensures leak-free, more confident to use. The filter has a fine mesh cover a portion of the design, which can effectively prevent the particles.