Professional testers have gauges with quality bourdon tubes and milled gears for accurate vacuum and pressure tests.
Features
·Screw-on replaceable bezel on both 2-1/2" and 3-1/2" gauge
·3-1/2" gauge comes with universal T and tapered adapters
Test Capabilities
·Vacuum leaks
·Sticky valves
·Worn rings or cylinder bores
·Uneven compression
·Fuel pump defects
Performance Specifications
Compression……………………0-30in.Hg
                                             0-700mm Hg
Pressure…………………………0-100 KPa  

                                            0-15psi