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Universal 30 pound cooling system and pressure cap tester is the quick, accurate way to tell instantly if a cooling system or radiator cap is defective. Use it anywhere a standard radiator cap fits. No guesswork, you see exactly where repair or replacement is needed. The tester comes with a 14 in. flexible hose, an easy to read color coded 2 in. diameter dial with ranges of 17-19 lbs., 20 lbs. and 28-30 lbs. spacers/adapters for 1 in. and 3/4 in. deep filler necks and instruction manual. All in a sturdy plastic carrying case.