• The universal cooling system pressure tester that eliminates the need for system adapters• Universal attachment to radiator or header tanks - Suits automotive, commercial, heavy duty, marine & motorcycles.• Fits bayonet and threaded filler necks on radiators or header tanks• Fluid drain tube allows coolant to be returned to the coolant reservoir or safely collected in a container for recycling• Identifies cooling system pressure leaks• Complete with 4 double ended adapters for testing 8 different radiator cap types