1.Type:2pump4headgradient 2. Flow rate 1) isocratic and gradient mode : 4 - 400 ml/min 2) isocratic mode only : Up to 800 ml/min 3. Increment : 0.1 ml 4. Pressure : 0 - 2 MPa (20 bar, 290 psi) 5. Flow rate accuracy : 2% (4-400 ml/min, 0-20 bar) 6. Flow rate reproducibility : rsd < 0.5% (4-400 ml/min,0-20 bar) 7. Viscosity : Max. 5 cP 8. Gradient composition 1) accuracy : 2% at 4-400 ml/min 2) reproducibility : rsd < 0.5% at 4-400 ml/min