... ! Excellent quality ,Competitive Price ! Reverse Osmosis membrane,ro membraneFRP Membrane Housing 8" Membrane Housing for Reverse Osmosis System1) Diameter: 8" 2) length: 1 ... , 2 ,3 ,4 ,5,6,7 membrane element 3)Max working pressure: 300,400,450,600,800 ... Felmtech,Hydranautics ,Trisep ,CSM ,Koch ,GE ,vontron and other standard membrane .