THIS MODEL IS THE CHOICE FOR MEDIUM SIZED AND LARGER SYSTEMS 5 LB AND ABOVE CAPACITY. THE 1/2 HORSEPOWER MOTOR MAKES COLD CONDITION START UP QUICK AND EASY. THIS TWO STAGE PUMP FEATURES A MANIFOLD VALVE TO ISOLATE IT FROM THE SYSTEM AND THREE INLET PORTS 1/4"" FL 3/8"" FL AND 1/2"" ACME FOR AUTOMOTIVE R134A SYSTEMS. WARNING: This product can expose you to chemicals including lead which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65warnings.ca.gov -