Multifunction and Wide Usage: The set is a all in one comprehensive radiator tool kit, includes cooling system leak tester for radiator leak detection, includes coolant vacuum refill tool for coolant filling, includes thermometer for temperature measurement. And there is a lot of radiator adapters and radiator cap adapters which widely compatible with GM, BMW, VW, GMC, Porsche, Chevy, Dodge, JEEP, Chrysler and many other models cars trucks airlift | Adapters: Coolant system leak checker and filling tool set is equipped with 17 specific adapters and 1 universal tapered rubber adapter, suitable for almost all types of radiator openings on classic and modern vehicles. Included 3 radiator cap test adapters and 2 connectors help to diagnose the leakage of radiator caps on most cars. All these adapters are color coded and placed exclusively, can be easily selected according to the marked pictures in instruction, convenient and no confusion | Water Tank Coolant Vacuum Refiller: Plastic covered premium brass manifold body, equipped with brass fittings, anti-corrosion and durable. The index range of gauge is -30 to 0 inHg (-76 to 0 cmHg), and normally -25 to -20 inHg is right time to add coolant. 18" rubber resin material weave reinforced hose, featured with anti-corrosion, low fluid resistance, high bearing pressure, ensure durability and good air sealing. 21" metal hook, 23" transparent bleeder hose and 60" refill hose are included | 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.(Need a vacuuming tool and not included in the kit) Add coolant in vacuum, there is no large air pocket and avoid warping or other damage in engine. Normally, it takes 5-10 mins to refill the coolant, the exact time depends on the size of the tank. Easy to operate and save time | Hand Pump Leak Detector: Radiator pressure test tool uses aluminum pump cylinder rather than plastic one, equipped with 21" rubber nylon resin hoses and brass fittings, solid and durable. 3" large dial gauge with index range 0 to 35 psi (0 to 2.5 bar), easy to observe. The hand pump tester pressurize on the reservoir and reservoir cap, and watch for pointer drop over time to confirm system leak down | Thermometer and Other Accessories: Stainless steel thermometer with index range 32 to 400 Fahrenheit. American air plug is pre-installed in the coolant filling tool and a spare European style air plug is also packed in the package for you to choose. Included detailed instruction will help you to quickly understand and use this set of tools. Customized blow molding case keeps everything in place and protects the gauges during storage