Quick cool gas adjustable joint includes high and low side couplers. The valve core puller is adjustable to fit different valve cores. Ideal for replacing valve cores without unloading or recovering the system. Internal ball valve retains charge and allows access to automatic A/C systems. Instructions: Wear gloves and safety goggles before beginning. 1. Unscrew the low-side (or high-side if applicable) port cover. 2. Connect the valve removal tool. 3. Insert the extractor. 4. Loosen the old valve core. 5. Pull the valve core up. 6. Remove the valve core. 7. The valve core is now removed. 8. Place the new valve core on the stem. 9. Install the new valve core. 10. Replace the protective cover on the low side port. Red indicates high side, blue indicates low side. The extractor valve core is adjustable to fit various valve core types. Suitable for replacing valve cores without releasing system refrigerant. Note: Product may vary slightly between batches. Actual item may show minor differences in color or design, which do not affect functionality. Color: As shown in photo Material: Metal Package Contents: 1 x Valve Core Remover Tool Set Note: Other items not included. Lighting and display settings may cause slight color variations between the image and actual product. Measurement tolerance: +/- 1-3 cm.