This is a comprehensive, high quality cooling system pressure testing kit complete with a range of adaptor caps allowing for use on a wide range of HGVs. Supplied with a thermometer to aid diagnostics & ensure the system is cool before removing the cap. Simple to use, this kit locates system leaks from the header, expansion tanks & fittings, the head gasket, radiator core, heater matrix, water pump, hoses, pipes & much more, ensuring you have every inch of the vehicles cooling system covered.