ESUPPORT Car 2" 52mm Air Fuel Ratio Gauge

Holes And Install Rubber Grommets Where Pressure Or Vacuum Line Passes Through Sheet Mental Such As Firewall. 3.Attach Nylon Pressure Line To Fitting On Back Of Gauge Using Adaptor ,Ferrule ,And Compression nut . Twist In Light Socket Assembly And Connect One Wire(Yellow) To Dash Lighting Circut Or Other 12V Power Source And The Other Wire(Black) To A Good Ground. Package includes: 1 x Air Fuel Ratio Gauge 1 x Users Manual In English Smoke tint lens during the day,Clear and bright LED Display during the night. Watch more clearly. High quality movement Make product measurements more accurate, Faster measurement, pay attention to your car in real time. Diameter: 2/52mm. Red LED illuminated needles. LED super white display. Air/Fuel Ratio Gauge Power: DC(10-15V) 12V Professional.