Specification:Power12VMaterial Type:aluminum alloyAnodised colour: PurpleLED Colour: RedLength: 72mmDiameter: 37mmMounting hole distance28mmQuantity1 pcFitment:Fit For Most CarFeatures-Purple shell.-Smoke Lens.-RED LED digital display.-Digital clearly show the Air Fuel Ratio.-High sensitivity and easy operation.Package Included:1 x Air Fuel Ratio Gauge3 x Screw2 x paster1 x InstructionNote: Easy Installation With Users Manual In English，Professional installation is Highly Recommended.