Starrett 263-M micrometer (with special tool / cylinder) Description: came from a High School laser lab. There is a micrometer that works 0-25mm metric range with what seems to be a micromanipulator holder at the end. For basic measures, please, see pics. If you want more measures, let me know. (I must add here that black cilinder "tool" is 20mm ext. Ø). It has some marks engraved by the staff regarding light wave length (see 3rd. pic), but maybe lens included with it is missing. Condition: normal usage marks. Nice working smooth condition (no "wobbling" nor "bad play or other issues found). This item is ready to be used as intended. Note: when needed, these items have been de-greased, cleaned, re-greased (with special oil, better than original grease) and checked for missing or damaged parts. Then tested and verified ok. Good functioning is garanteed.