1. Material: carbon steel
2. Length: about 26 cm from 0-200mm, about 31.5 cm from 0-250mm, and about 35.5 cm from 0-300mm
3. Width: about 4 cm
4. Weight: about 386g for 0-200mm, about 423g for 0-250mm, and about 426g for 0-300mm
5. Scale process: magnetic stripe film
6. Graduation value: 0.1mm
7. Scope of application: measuring marking

Features:
1. Magnetic stripe engraved, clear scale and convenient reading
2. Fine workmanship, no burrs, comfortable grip
3. Stainless steel material, anti-rust and anti-corrosion, durable
4. Rotating fixed knob, locking knob can fix caliper sliding
5. Easy to use, wide applicability

Reading method of marking ruler:
1. Check whether the zero scale lines of the main ruler and the auxiliary ruler are aligned. If they are aligned, you can measure; if they are not aligned, record the zero error
2. The scale on the main ruler is in centimeters. For example, if the zero scale on the sub-ruler is between 11 and 12 on the main scale, the scale on the main ruler means 11cm (110mm); from the figure, the integer is 112mm, because the main scale The 112th line of the ruler is close to the right of the "0" line of the auxiliary ruler
3. The third line of the minor scale is aligned with a line on the main ruler, the decimal is 0.1mmx3=0.3mm, so the sum of the two readings is 112.3mm