Micrometer like new but box is very dirty inside The Insize 3203-6A Outside Micrometer is a precise measuring tool designed for industrial applications. With a range of 5-6 inches and a resolution of 0.0001 inches, this analogue micrometer is perfect for accurately measuring the outside dimensions of various parts and components. The Insize brand is known for its quality and reliability in the field of micrometers, making this tool a valuable asset for professionals in a range of industries.