The CUNO Water Factory 66-4706G2 reverse osmosis membrane is for use with CUNO SQC 2 HF, CUNO SQC 3 HF, CUNO SQC 4 HF, and CUNO SQC PRO. Replaces the CUNO Water Factory 66-4703G2 discontinued reverse membrane. CUNO Model 66-4706G2 RO membrane module provides 36 Gallons per day of separating fresh, clean drinking water from everyday tap water. Effectively reduces: Total dissolved solidsleadcysts (Crytosporidia and Giardia)bariumradium selenium