Capless cooling system tester uses an inflatable bladder to seal the pressure head to the radiator or header tank. Bladder system can be used on both screw & bayonet fittings & seals 90% of cars & light commercial vehicles straight out of the box. Also suitable for motorcycles, off-road & marine applications. Supplied with set of double end adaptors enabling testing of cooling system pressure caps. Supplied in carry-case. Model No. VS0031