Compatibility: The fuel pressure tester kit is equipped with 1/4", 3/8", and 5/16" quick connects, making it compatible with Honda, Ford CFI EFI, GM MPI and Chrysler MPFI. Note: not for diesel high pressure injection pump or direct-injection engine Long lasting quality: Adapters in fuel pressure tester constructed from high-quality brass and aluminum resist rust and corrosion, rugged and long-lasting Accurate Reading: With a dual-color-coded scale for readings range between 0-100psi (0-7bar), built-in release valve for quick and safely operation. Easy to read and provide you more precise and accurate readings Function: This fuel pressure gauge is adept at swiftly and efficiently assessing fuel injection pump pressure. It can diagnose variability problems caused by poor fuel pressure. Used to check if fuel pump is defective or inconsistent in pressure flow Convenient Storage: This fuel injection pressure tester kit is contained in a carrying case, design for quick storage and easy transportation. A must-have efficient tool set for the task of vehicles maintenance