- 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 storage case.