Description:This tool is a good replacement ofthe old valve core in the R134A and R12 connector of the car's air conditioner. The broken valve core can be removed through the use of this tool. In the process of removing, the refrigerant in the air conditioner will not leak as the valve lever on this tool is closed, and it is unnecessary to pour the new refrigerant into the air conditioner. Features:1. Adjustable cool gas quick joint.2. Inclosed low side coupler, the refrigerant will not leak.3. The valve core puller is adjustable to fit the R134A / R12 / CR-206 valve core.4. Excellent for replacing valve cores without releasing the refrigerant valve core changer.Specifications:Material: Copper + AluminumLength: Approx. 11.5 cm / 4.53"Valve Core: R134 / R12 / CR-206Coupler: Low Side (Blue)Package Weight: Approx.150gQuick Joint: Air ConditioningUsage:At this point you should put the gloves and goggles on, and then you can replace the valve core(s) as described below.1. Unscrew the low-sideport's cap2. Connect the valve removal tool 3. Insert the extractor4. Unscrew the old valve core5. Pull the valve core up6. Remove the valve core7. The valve core is now out 8. Put the new valve core on the rod9. Install the new valve core 10. Place the protective cap back on the low-side portPackage Included:1 x Blue Valve Core Quick Remover Tool (Low Pressure Side)Note:1. Please allow 1-3cm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard..