The 30ML AC Cooling Agent Oil Charger Tool is the perfect solution for automotive and refrigeration purposes. With its easy-to-use gauge injection feature, you can precisely charge your cooling agents to maintain optimal performance in AC systems. The tool features a 1/4 inch SAE thread attachment, allowing for quick and easy refilling. The plastic components ensure a secure grip, while the copper components provide excellent conductivity and longevity. The accompanying 1-inch SAE filling tube is ready to go, saving you time and effort in setup. Overall, this product is a must-have for any professional looking to maintain their AC cooling agent levels efficiently and accurately.