The draper 23420 expert 33 piece radiator and cap pressure test kit is designed for pressure testing radiators of most popular vehicles as well as also being able to pressure test radiator caps for leakages 33 colour coded adaptors allow direct connection to radiator or expansion tank the draper radiator and cap pressure test kit also comes with a hand pump with gauge graduated with bar and psi to allow simple and easy controlled pressurization via a quick coupling system pressure release pi