Updated kit designed to measure return fuel flow on diesel vehicles up to 6 cylinders, fitted with common rail injection system. Identifies worn, blocked or inoperative injectors quickly and easily. Contains measurement tubes for short term tests and measurement bottles for long term, more accurate evaluation. Master kit includes range of adaptors to suit Bosch, Delphi, New Delphi and Denso injectors for comprehensive coverage of common rail diesel vehicles. Supplied in carry-case.