The quality and reliability of the inner diameter measuring instrument have been recognized by experts in the world. SUBITO precision inner diameter measuring instrument is used to measure the inner diameter of the cylinder block. Two-point contact precision inner diameter measuring equipment is used for pre-process or final inspection. Suitable for testing high-precision mass production parts. In the process of measuring the aperture, the probe is automatically aligned through the center plate, the wider the width of the center plate, the more correct the center, the more accurate the measurement, the need to confirm the reversal point. Obtain the minimum display value by rotating the gauge. The connecting rod is made of special nickel alloy to ensure the measuring accuracy.