Features • Precision Measurement Tool: Achieve high accuracy with a measuring range of 50-160mm, ensuring reliable results for all your internal diameter needs • Self-Centering Design: Features an excellent guiding bridge for accurate and dependable self-centering, enhancing your measurement efficiency • Versatile Probes: Equipped with an active probe and interchangeable options, adapt effortlessly to various aperture sizes for comprehensive measurements • Durable Aluminum Alloy: Constructed from robust aluminum alloy, this tool guarantees longevity and exceptional performance in demanding environments • Ideal for Machining: Suitable for comparative measurement of inner diameters, making it an essential ruler for professionals in machining and engineering applications Features: 1、Suitable for comparative measurement of the inner diameter of the workpiece, machining measurement 2、With an excellent guiding bridge, self-centering is accurate and reliable 3、The measuring head has an active probe at one end and an interchangeable probe that is changed according to the measured aperture. 4、Made of aluminum alloy material, and long service life 5、High accuracy, the measuring range is 50-160mm Specification: Item Type: Internal Diameter Gauge Measuring Range: 50-160mm Accuracy: 0.01mm Material: Aluminum Alloy Size: 50-160mm Measuring Range: 50-160mm Package List: 1 X Internal Diameter Gauge with Handle 1 X Guard Bridge (55mm) 12 X Side Head (No.12:105mm) (No.11.:100mm) (No.10:95mm) (No.9:90mm) (No.8:85mm) (No.7 80mm) (No.6 :75mm) (No.5:70mm) (No.4:65mm) (No.3:60mm) (No.2:55mm) (No.1:50mm) 4 X Interchangeable Side Head (3 2 1 0.5) 1 Pack Installation Internal Diameter Gauge Accessories 1 X Plastic Box (the color of box is random which has black and blue) Note: betweendiv>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.between/div> Package List 1 X Internal Diameter Gauge with Handle 1 X Guard Bridge (55mm) 12 X Side Head (No.12:105mm) (No.11.:100mm) (No.10:95mm) (No.9:90mm) (No.8:85mm) (No.7 80mm) (No.6 :75mm) (No.5:70mm) (No.4:65mm) (No.3:60mm) (No.2:55mm) (No.1:50mm) 4 X Interchangeable Side Head (3 2 1 0.5) 1 Pack Installation Internal Diameter Gauge Accessories 1 X Plastic Box (the color of box is random which has black and blue)