VACUUM TYPE COOLANT FILLING FUNCTION: Pneumatic vacuum coolant filler first sucks and forms a vacuum on the cooling system by using shop air, then draws coolant into the cooling system. Add coolant in vacuum, there is no large air pocket and avoid warping or other damage in engine. Normally, it takes 5-10mins to refill the coolant, the exact time depends on the size of the tank. Easy to operate and save time..WIDELY USAGE RADIATOR PURGE AND ANTIFREEZE REFILL TOOL: JIFETOR antifreeze filler kit includes a O.D. 32mm rubber adapter and 3 sizes adapter sleeves, with O.D. 45mm 40mm and 35 mm, fit for most types of vehicles. The adapter sleeves can be attached on the adapter on refill tool, and then replace the radiator cap to seal the cooling system, to help radiator purge and coolant refill. Please check your radiator opening size before bidding, there are only 32mm 35mm 40mm 45mm, 4 sizes adapters..WATER TANK COOLANT VACUUM REFILL: Premium aluminum manifold body, equipped with brass fittings, anti-corrosion and durable. The index range of gauge is -30~0inHg (-76~0cmHg), and normally -25~-20inHg is right time to add coolant. Tee fittings is used for vacuumizing, and coolant filling hose for refilling coolant..ACCESSORIES: There are 2 styles air plugs in the case for you to choose, European style air plug and a American style one (pre-installed on the coolant fill tool). JIFETOR coolant system purge and filling kit also includes a 60" long coolant filling hose, and a 23" long splash-proof bleeder hose, transparent for easy observation, and also equipped with anti-corrosion and durable brass fittings. Customized blow molding case keeps everything in place and protects the gauge during storage..SATISFACTORY CUSTOMER SERVICE: 30 days full refund with returned undamaged JIFETOR complete cooling system purge and coolant refiller set. Any quality related problem in 1 year, we will replace the fittings for free or refund. Any question, please feel free to contact us by email or amazon message system, we will reply ASAP in 24 hours.