1、Double scale reading mm / inch. 2、Accurate measurement, easy to read. 3、Made of high hardness carbon steel, rustproof and durable in use. 4、Easy to measure length, inner/outer diameter, depth of objects. 5、A must tool for home, industry, crafts applications to measure stone, bead, gem, jewelry and more. Features: Double scale reading mm / inch. Accurate measurement, easy to read. Made of high hardness carbon steel, rustproof and durable in use. Easy to measure length, inner/outer diameter, depth of objects. A must tool for home, industry, crafts applications to measure stone, bead, gem, jewelry and more. Specification: Material: Carbon steel Measuring Range: 0-150mm Accuracy: 0.02mm Package Weight: Approx. 308g/ 10.8oz   Package List: 1 * Vernier Caliper Note: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.