Newport MM-2 kinematic mirror-lens mount + 1" borofloat laser mirror (similar to NEWPORT 9806-K / 5103) 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). Screws are metal 100 TPI and mount has installed a Ø 1" (25,4mm) mirror. Used in laser R D, this mirror must stand laser power, so I guess it is prepared somehow for that task. It seems a borofloat silver mirror. Condition: normal usage marks. Nice working condition. Mirror has some light microscratches, but overall I would say it still gives 98% performance. I made pictures of mirror under strong light and several angles so that you may see clearly defects. Please, have in mind these defects are greatly magnified by light and angle. At first sight you would say mirror is like new! :) 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. OFFERS: feel free to send me offers.