Product Description This MRO replacement filter is only compatible with Waterdrop N1 countertop reverse osmosis water filtration system.The RO membrane operates down to an unimaginably tiny pore size of 0.0001 microns, to effectively reduce most harmful substances in water, including many inorganic impurities (antimony, cadmium, chromium, cyanide, mercury, etc.), dissolved solids, radionuclides, and synthetic organic chemicals. The MRO replacement filters do not require tools or expert plumbing skills to install. You only need just 3 seconds to replace the filter cartridge.It is recommended to replace the MRO filter with a new one every 18 months. We base this recommendation on the usage and local water quality – both factors determine the cartridge lifespan. Kindly note that prompt replacement ensures optimal filtration performance.Plastic bottles take hundreds of years to decompose. Waterdrop helps to reduce plastic waste. Remove the water tank Remove the MRO filter Insert the new filter cartridge Reset and flush On Dec-24-21 at 01:02:58 PST, seller added the following information: