(1, 5, 10, or 15) x 100 GPD Membrane HIGH QUALITY Reverse Osmosis Membrane widely used on household Reverse Osmosis systems ,aquariums RO systems and applications. Fits all membrane filter housings sizes 1812 & 2012Membrane 100 GPD Certified to To remove particles down to 1/10,000 of a micron ( which is 98% of impurities including Organic and inorganic, chemicals).Replace every 2 years.General Information :The first full tank of permeate should be discarded. Do not use this initial permeate for drinking water or food preparation.Keep elements moist at all times after initial wetting.If operating limits and guidelines given in this bulletin are not strictly followed, the limited warranty will be null and void. To prevent biological growth during prolonged system shutdowns, it is recommended that membrane elements be immersed in a preservative solution.The membrane shows some resistance to short-term attack by chlorine (hypochlorite). Continuous exposure, however, may damage the membrane and should be avoided.Membrane Features :Innovative thin layer composite membrane designAdvanced membrane technologyProvides high rejection stability even with high TDSLess fouling, Less frequency cleaning and More consistent100% dry membrane maximizing shelf life Lower consumption of chemical and longer life