This internal micrometer from TESA is a high-quality tool for measuring small lengths accurately. With a range of 40-50 mm and a total length of 130 mm, it is perfect for a variety of applications. Made in Switzerland and featuring the TESA brand name, you can trust that this unit is reliable and durable. It comes in a quantity of 1, making it a great addition to any toolbox. This unit is ideal for use in other test, measurement, and inspection tasks, as well as in business and industrial settings.