Frame: Stainless Steel. Memberane: Adanced and patented RO Membrane Element, High Quality, ... ,Low Noise, advanced and imported High Pressre Pump3,Imported Flow Gauge, monitoring water flow and recycling rate at any time4,combined with auto ... food and drinking3,desalination for sea and brackish water4, waste water treatment for metallurgy, light industry, electroplating and leather industry and ...