... Manufacturer ! Excellent quality ,Competitive Price ! FRP Pressure Vessel8" Membrane Housing for Reverse Osmosis System1) Diameter: 8" 2) ... length: 1 , 2 ,3 ,4 ,5,6,7 membrane element 3)Max working pressure ... 20°F to 120°F)8)Burst pressure :1800psi9)Operating pH range:3-1110 ... range:2-12(less than 30min)suitabe for Felmtech,Hydranautics ,Trisep ,CSM ,Koch , ...