The Cuno SQC Series of Reverse Osmosis systems (Formerly Water factory and now owned by 3-M) is one of the most popular brands ever.  We sell only genuine replacement Cuno SQC replacement filters.  There are several systems available, but the two most popular models are the SQC3 and the SCQ4.   Just select which filter you need by the CUNO SQC factory part number.  The G2 on the end of filter part numbers indicates that these filters have been labeled for Water Factory Systems, but these are the same filters are used for three different brand named systems (Water Factory Systems, CoolerMate, and FaucetMate), all manufactured by CUNO.

SQC Manual

SQC FAQs

SQC Data Sheet