1.) Easy to use for testing leaks in radiators by connecting
the pressure tester pump to a test cap 0r adapter onto
the radiator
2.) Connectors are to test leaks in the pressure cap as well
as the cap's ability to release pressure.
3.) 13 test caps and adapters cover a great variety of sizes
that can be applied to numerous types of vehicles.
4.) Test cap number: no. 3-15
5.) A thermometer is included for measuring coolant
temperature for safety reasons.