Features: This oil gun nozzle can be used to measure the flow of pipeline fluid. Well designed gun nozzle is resistant to oil dropping or leaking, small size, accurate measurement, simple operation. It provides four units of Liters, Gallons, Pints and Quarts. Used for filling fluid such as diesel, kerosene, gasoline. It is a great oil filling equipment for factories, gas stations, etc. Specification: Model: AC-15A Material: Aluminum Nozzle Size: BSPT/NPT 1"(25mm) Flow: 4.5m3/h Pressure: 0.25MPA Suitable Fluid: Diesel, kerosene, gasoline Weight: 1416g / 49.9oz(approx.) Package list: 1 * Oil Gun Nozzle 1 * Connector Instructions: 1. Two buttons; (CALIBRATE) and (DISPLAY) 2. Measurement unit: unit is selectable by panel button from these four: liter(LTR), gallon(GAL), pint(PT), quart(QT). When changing unit, press and hold (CALIBRATE) button for 5 seconds, the digits on display will flash from left to right; press (DISPLAY) to move to the last position, unit will flash from top to bottom, then press (CALIBRATE) to select unit. 3. Standby state: standby state is low power consumption state; when there is measurement pulse input, it will display real-time filling quantities. 4. Measurement range is 9999.9, if over this range, it will automatically reset to zero. 5. Real-time filling amount reset: Press (DISPLAY) button to reset real-time quantity to zero. Cumulative quantity reset: take out battery, and when put battery back in, press and hold (DISPLAY) to reset cumulative quantity. 6. The default unit of real-time measurement is Liter (LRT). 7. At standby state or when it shows real-time filling quantity, press and hold (CALIBRATE) to display cumulative filling quantity. 8. Release (CALIBRATE) button or when there is measurement pulse input, it will return to display of real-time filling quantity. Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.