Genuine Aquasana stage 2 replacement reverse osmosis membrane for SmartFlow Reverse Osmosis Water Filter Systems including the following models: AQ-SFRO-NF, AQ-SFRO-CHR, AQ-SFRO-BN, AQ-SFRO-ORB, and AQ-SFRO-MB. Not compatible with OptimH2O systems.

Easy Filter Replacements - Simply twist out the used cartridge and replace it with an Aquasana replacement filter for continued contaminant removal. Use only certified, genuine Aquasana replacements. Lasts 1 year.