Specification: Size: 0-100mm/0-3.9in Pen head: bullet type 1.0 Material: plastic Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. Included: 1 x Vernier Caliper Pen 1. 2-in-1 Functionality: Caliper type ballpoint pen combines the convenience of a ruler and the practicality of a pen. Enjoy the versatility of using it as both a measuring tool and a writing instrument. 2. Durable and Replaceable: Our push-button mechanism makes it easy to disassemble and replace the ink cartridge, ensuring long-lasting use. With its sturdy plastic construction, multifunction vernier is built to withstand everyday wear and tear, providing value for your money. 3. Multiple Pen Color Options: For roller ball pen, you can choose between black or blue ink cartridges to suit your preference. Whether you need to take notes, draw diagrams, or mark measurements, we've got you covered. 4. Precise Measurement Range: With a measurement range of 0-100mm, stationery portable tools allows for accurate and meticulous measurements in various applications. Ensure precision in your work every time. 5. Bullet-tip Design: The bullet-shaped 1.0mm plastic stationery tip ensures smooth and consistent writing performance. Experience effortless ink flow and precise control for detailed work and legible writing.