Storage Toolbox: This coolant vacuum refill tool comes with a dustproof, waterproof toolbox to keep all components neatly organized. Note: Never replace coolant when the engine is hot. Always wear safety goggles and gloves, and handle the coolant system carefully to avoid hot fluid spray Vacuum T-Fitting & Fill Hose: Our vacuum refill system features US standard air nozzle with an additional EU nozzle for flexible compressor connection. Includes a 3.3 ft (1 m) transparent, durable fill hose with built-in filter to avoid debris from entering the radiator Leak-Proof Refill Tool Kit: Made of high-strength aluminum, the coolant vacuum refill kit ensures excellent sealing and pressure resistance. Features a shock-resistant precision gauge (-76 to 0 cmHg / -30 to 0 inHg; max vacuum -0.83 bar / -62 cmHg) and brass quick connectors with thread seal tape for fast, secure connections Fit Most Vehicles: The vacuum coolant fill kit includes multiple adapters OD: 1.38/1.57/1.77/2.17 in (35 / 40 / 45 / 55 mm) plus a tapered universal adapter (fits 0.55–1.8 in), fitting most cars, SUVs, pickups, and light trucks, including BMW, Ford, Fiat, Volkswagen, Porsche, Mercedes-Benz, Nissan, Mercedes-Benz, and Nissan Radiator Vacuum & Fill Kit: The radiator vacuum refill kit quickly vacuum and fill coolant that helps avoid airlocks for better circulation. Works with an air compressor (not included) to save time and eliminate tedious bleeding steps