52mm Universal Smoke Len Tachometer RPM Turbo Boost Gauge 2 Bar PSI Water Temp Meter Oil Preure Gauge for 12V Gasoline Car Fit for 12Volts Car: There are several of the same series:1: Turbo Gauge (Bar) (-1BAR-2.0BAR) / (PSI) (-30 - 30 PSI)2: Water Temp Gauge (40-120 Celsius)3: Oil Temp Gauge (50-150 Celsius)4: Oil Pre Gauge:( 0PSI-100PSI)5: Volt meter (8V-18V)6: Air fuel ratio Gauge7: Exhaust gas temp Gauge (2-12 x100 Celsius)8: Vacuum Gauge (-30-0 In.Hg)9: Tachometer (0-8x1000) 1. Boost gauge bar Fitment: For all 12V CARSPackage include:1 x Turbo Boost Gauge (-1~2 BAR )1 x Users Manual In English 2. Boost gauge psi Fitment: For all 12V CARSPackage include:1 x Turbo Boost Gauge(-30~30 PSI)1 x English Manual 3. Water temp gauge Fitment: For all 12V CARSPackage include:1 x Water Temp Gauge( 40-120 Degrees celsius 1 x English Instruction1 x Water temp sensor(1/8NPT) 4. Oil temp gauge Fitment: For all 12V CARSPackage include:1 x Oil Temp Gauge( 50-150 Degrees celsius1 x English Instruction1 x Oil temp sensor(1/8NPT) 5. Oil pre gauge(psi) Fitment: For all 12V CARSPackage include:1 x Oil Pre Gauge( 0-100 PSI)1 x Oil Pre Sensor(NPT1/8)1 x Users Manual In English 6. Tachometer RPM Gauge Fitment: 12volt, 1~8 cylinder, gasoline carPackage include :1 x Tachometer Gauge0-8000 RPM1 x Users Manual In English