Membrane Shell ! Manufacturer ! Excellent quality ,Competitive Price ! Membrane Shell ,FRP Pressure Vessel8" Membrane Housing for Reverse Osmosis System1) Diameter: 8" 2) length: 1 ... , 2 ,3 ,4 ,5,6,7 membrane ... Hydranautics ,Trisep ,CSM ,Koch ,GE ,vontron and other standard membrane .