To inject the oil or dye, simply connect the injector to the low side of the A/C system and twist the handle until you reach the desired amount
The injector hose comes complete with a R134a coupler and auto shut-off valve adapter for 1/4"FL systems
Includes R134a 13mm Connection and 2 oz. Bottle of Concentrated A/C Dye (25 Applications)
WARNING: This product can expose you to chemicals including LEAD AND LEAD COMPOUNDS, 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.