Easily measure inner diameter, outer diameter and depth. Equipped with a large LCD display that's easy to read. The minimum reading scale is 0.1mm/0.01 inch. Measuring range is 0-150mm/5.91". Specification: Material: plastic Range: 0-150mm/5.91" Units of measurement: inches, millimetres Resolution: 0.1mm/0.01in Accuracy: ±0.1mm/±0.01in