The Astro Pneumatic 7859 Universal Cooling System Pressure Tester allows for easy testing of cooling systems up to 24psi (1.65 bar). Its color coded pressure gauge allows safe, easy and accurate testing of cooling system and its quick coupler allows for the quick and easy connection of pump and test adapters. This unit is suitable for domestic and import vehicles. The set includes a 1pc - Hand pump with gauge, hose, quick coupler and pressure release valve, 1pc - Universal radiator adapter with inlet diameter range of 16mm-25mm, 1pc - Universal auxiliary radiator tank adapter and 3 rubber seals with inlet diameter range of 34mm- 45mm, 1pc - Open End Wrench, 1pc - Fixed handle socket wrench.