Domestic Ro membrane (2G) Model(2G) 1812-50,1812-75,2012-100,2012-150,3012-300,3012-400 Pressure: 60psi Salt Rejection(%): 97.0 Flow Rate(GPD): 50, 75, 100, 150, 300, 400 Effective membrane area:3.5/4.2/5.0/5.2/36/40ft2 Also we have 3G RO membrane, salt rejection is 98%.