Introducing the SK Niigata Seiki RG-18.2 Alloy Steel Ring Gauge, the perfect addition to the Squares, Bevels, and Gauges category. This precision measuring instrument boasts a tolerance of ±1.0 μm, ensuring accuracy and reliability in your measurements. The chamfer, measuring 1.2 mm, offers additional convenience and ease of use. The RG-18.2 model showcases outstanding roundness and cylindricity with a value of 0.5', providing unparalleled precision. With dimensions measuring F: 1 mm, this ring gauge is perfectly suited for a variety of applications. Its nominal size of 18.2 mm and outer diameter of 45 mm make it suitable for a wide range of tasks. Truly a gem in the world of measuring instruments, the SK Niigata Seiki RG-18.2 guarantees accuracy and durability, making it a valuable addition to any toolkit.