This is a special tool kit for cars. For the replacement and filling of automobile antifreeze. It’s easy to use and professional. Come and try it. Features: Easy to use and install, and long life. Made of high-quality materials, practical, wear-resistant and not easily oxidized. The storage box provides better protection and storage of tools and accessories. With a negative pressure gauge, you can clearly read the pressure value during operation. specification: Main material: plastic + metal Color: Black + Blue + Red Meter diameter: 50mm Length of transparent hose: 1580 mm Length of the blue tube: 430 mm Air source outside diameter: 7 mm Diameter rat tail: 4mm / 0.2in Diameter hose connection coolant: 8 mm / inch Diameter connection radiator cover: 8mm / inch Air pressure: 90psi air Consumption: 12cfm fluid Instructions: Liquid antifreeze replacement filler 1 * Empty all the water in the water tank 2 * Open the car hood and hang the hook in place 3 * Connect the universal rubber joint with the water tank or choose a suitable one Connector to the water tank 4 * Make sure all switches are closed. Connect at the interface and then connect to the water tank 5 * Connect the air intake pipe, open the air intake switch, connect the air pump to evacuate When the pressure reaches -20 ～ -25lnhg (-50 ～ -60cmhg) N.3 switch off 6 * Connect the antifreeze hose to the watch body, and put the other end into the antifreeze In the container, the interface must be completely submerged below the water level, open The antifreeze of the water inlet switch is automatically replenished to the water tank. packing list: 1 * Vacuum purge filling tool 1 * universal radiator adapter 1 * Coolant hose 1 * User manual