Newport kinematic mirror and lens mount Similar to 9806-K Description: nice lens kinematic mount removed from High School laser lab. Measures: 2x2" (51x51mm). The lens holder is a bit smaller, around 51x49mm. It has 8-32 imperial screw holes to mount to other components or breadboard (you can get them in or here: https://www.newport.com/p/DE-8-0.63). Remember "8-32" is similar to M4 but with bigger thread pitch. There are also 3 of these threads in the "lens mount" part (see pics). High quality. Screws are metal 100 TPI. Condition: normal usage marks. Nice working condition. Note: 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. Issues: some marks of normal usage here and there.