... " Membrane Housing for Reverse Osmosis System1) Diameter: 8" 2) length: 1 , 2 ,3 ,4 ,5,6,7 membrane element 3)Max working pressure: 300PSI4)connection: Side ... pH range:2-12(less than 30min)suitabe for Felmtech,Hydranautics ,Trisep ,CSM ,Koch ,GE ,vontron and other standard membrane . Membrane Housing 8040 End Port