Feature: Durable to use: The vernier caliper is made of plastic with an embedded metal bar inside, ensuring durability and practicality. With a proper size and lightweight design, it is easy to carry and use. Practical design: The double scale on the vernier caliper is clear and easy to read, allowing accurate measurement readings. It can be used for measuring buttons, pearls, jewelry, rings, bottles, cans, and other small items without scratching the surfaces. Size: As shown in the image Package includes: 20 mini plastic vernier calipers, sufficient for your usage and replacement needs. Ideal for sharing with family members, classmates, or colleagues. Size detail: The mini double scale plastic vernier caliper measures 15.21 cm in length, with a measurement range of 0–6 inches / 0–150 mm, meeting various measuring requirements. Its compact design allows for convenient carrying and use. Convenient to use: The clear double scale enables accurate and precise readings. Measurement increments are in 1/16 inch / 1 mm. Color: Black Material: Plastic Package Contents: 20 x Caliper Note: Light reflection and differences in display screens may cause slight variations in color compared to the actual item. Measurement error allowance is +/- 1–3 cm.