ACCURATE: With an excellent guide bridge, self-centering is precise and reliable. MEASUREMENT RANGE: High precision, the measuring range is 50-160mm. USED IN: The gauge is suitable for comparative measurement of the inside diameter of the workpiece. INSTRUCTIONS FOR USE: The measuring head has an active probe at one end and an interchangeable probe which is changed according to the measured aperture. HARDWARE: The gauge is made of aluminum alloy material, durable and long life. Specifications: Element type: inner diameter. Measuring range: 50-160 mm. Accuracy: 0.01 mm. Material: aluminum alloy. Dimensions: 50-160 mm. Measuring range: 50-160 mm. Package contents: 1 inner diameter gauge with handle. 1 protection bridge (55 mm). / P 12 x lateral head (n 12: 105 mm) (n 11: 100 mm) (n 10: 95 mm) (n 9: 90 mm) (n 8: 85 mm) (n 7: 80 mm) (n 6: 75 mm) (n 5: 70 mm) (n 4: 65 mm). 55 mm). .1: 50 mm) 4 x interchangeable side head (3 2 1 0.5). Accessories for internal diameter gauge for installation in set of 1 1 x plastic box (the box color is random, black). Note: this does not include other things, the color is based on the first picture, and the other pictures only show the effect / p Due to the differences between different monitors, the picture may not reflect the actual color of the item. Due to manual measurement. Please allow deviation. Thank you!