Paul N Gardner Co. Gardco WF-2102 IC Type precision coating, paint, etc. wet film thickness gage. 0 to 1 Mil, and 0 to 25 Microns range. About 2" inches in diameter. I'm calling it used because it is pre-owned but it appears very clean and my non-expert eyes can't find any signs of usage, so it has been well cared for, used minimally, or unused. No nicks or scratches I can find and it rolls smoothly. Any questions or if you need more pictures just ask.