RO Filter 30" x 4"Tucker 30" x 4" RO Membrane Superior Water Production for Pure Water Systems The Tucker 30" x 4" RO membrane is engineered to deliver the highest water production rates available for any 30" x 4" membrane on the market. By upgrading to the Tucker RO membrane, you'll immediately notice a significant increase in pure water output compared to non Tucker branded membranes. Key Features: Unmatched Water Volume: The Tucker RO membrane produces more pure