Specifications: Features: - Accurate and quick measuring, help to ensure your vehicle's wheels are at their correct pressure ratings at all times - Fits for most kinds of vehicles' wheels, such as cars, motorcycles, bicycles and etc. - Easy operation & High precision and repetition - Comes with metal housing, durable for your using Measure Range: - 0 ~ 100 Lb/sq.in - 0.5 ~ 7.5 kg per square centimeter Material: Metal Color: Grey and Silver Dimension: - Overall Length: 95mm - Dial Diameter: 47mm Operation Guide: - 1. Your vehicle need to be parked in the flat ground. Be sure to measure the Tire Pressure in the cold car. - 2. Before using, ensure that the gauges is set to zero, and push the nozzle onto the tyre valve so that a good seal is made between the valve and nozzle. If you fail to do this, it will result in an inaccurate reading. Once the nozzle is correctly applied, wait for the pressure reading to be stable and then remove the gauges quickly from the valve and read the measurement. - 3. We suggest to measure the tire pressure at least one time per month.