The Cuno 3M Water Factory Systems 47-55710G2 Carbon Block Filter is designed for use with Water Factory SQC Series Reverse Osmosis Systems. Genuine Water Factory Systems replacement filter. Easy Installation and filter change. Specifications: Media: Carbon Block Reduces: chlorine taste odor, particulates, and many other impurities High Capacity Filter The 4755710G2 can be used as a post filter in any of the following systems: SQC 1 HF, SQC 2 HF, SQC 3 HF, SQC 4 HF, and the CUNO SQC PRO. This Water Factory Replacement Carbon Filter should be changed every 12 months based on water quality and usage.