Various specifications: to meet your different requirements, different universal sizes are available. Optional 25 mm, 50 mm, 75 mm, 100 mm. Not easily deformed: the measuring rod is made of high-quality stainless steel, which is not easily deformable and Use: stainless steel dipstick is mainly used for micrometer calibration. It is lightweight, easy to use and carry. Accuracy: the measuring rod as an adjustment standard is directly involved in the zero point adjustment of the external micrometer, which directly affects the accuracy of the micrometer. Note: The micrometer 0-25 mm does not require a dipstick. Micrometer 25-50 mm uses a 25 mm dipstick; for a micrometer of 50 to 75 mm, a 50 mm rod is used. Micrometer 75-100 mm uses a 75 mm dipstick; micrometer 100-125 mm uses a 100 mm dipstick., Manufacturer: Hililand