The SQC Filter Pack provides 2 to 3 years of water filtration. This is the replacement filter for SQC3 Reverse Osmosis drinking water systems. The Filter Pack includes (6)47-55706g2 and (6)47-55710g2 Part # 47-55700G2-S3. The pre and post filters are easy to change. The safe, clean replacement filter eliminates disturbing the filter media. The RO module is equipped with quick-connect fittings for easier replacement. Sanitary Quick Change systems (SQC) eliminate the need to replace/handle the filter media that can be very expensive. SQC Filter Pack helps to filter out toxic contaminants like Arsenic, Barium, Lead, Cadmium, Radium 226/228, Fluoride, Total Dissolved Solids (TDS), and Turbidity apart from cysts and the unpleasant taste and odor of chlorine.