This is a Starrett Tubular ID Inside Micrometer Set, comes in original box with original paperwork. This is the highly desired model number 823A, with a range of 1-1/2 to 8 inches. It is a precision tool designed for measuring inside diameters with high accuracy. The micrometer has a mechanical reading and a resolution of 0.00100 inches. It is made in the United States. Smooth rotation feels like it’s brand new. If you have any questions, please ask, and I will respond promptly.
eBay