Model 360: 0.08 - 880 ml/min Model 380: 0.44 - 2800 ml/min Model 380AD: 0.41- 3600 ml/min Model Pro-280: 0.49-3700 ml/min for 1.6mm Wall Thickness Tubing Model Pro-281: 3.6 - 3100 ml/min for 2.4mm Wall Thickness Tubing Model Pro-380 0.45 - 3400 ml/min for 1.6mm Wall Thickness Tubing Model Pro-381 3.3 - 2900 ml/min for 2.4mm Wall Thickness Tubing > > Have a question ? Our engineers are on standby to assist you at 1-800-426-3856 .