Use with the Mityvac cooling system pressure testers to test caps on many European vehicles. Quickly detects defective cooling system caps, a commonly overlooked cause of cooling system failures.. Adapters connect to tester using self-locking quick disconnects that won't leak under pressure. Includes six (6) molded adapters, designed for comfort grip while attaching and removing cap. MVA204, MVA205, MVA206, MVA208, MVA209 and MVA213.. Complete with molded storage case and space for additional adapters as needed. Includes six (6) adapters to test cooling system caps found on many European vehicles with the Mityvac cooling system pressure testers.