• 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.• Supplied with measurement tubes for short term tests and measurement bottles for long term, more accurate evaluation.• Supplied in storage case.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. Supplied with measurement tubes for short term tests and measurement bottles for long term, more accurate evaluation. Supplied in storage case.• 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. • Supplied with measurement tubes for short term tests and measurement bottles for long term, more accurate evaluation. • Supplied in storage case.