Thorlabs kinematic mirror and lens mount Similar to KM100 Description: nice lens kinematic mount removed from High School laser lab. Measures: 2x2" (51x51mm). The lens holder is SM1 threaded (about 26mm) and needs a retainer ring or a DIY solution (not included). It holds 25,5mm and smaller lenses (lenses smaller than 23,7mm would need a longer locking screw and use the mount in horizontal position). The big hole is Ø 31,75mm (around 1,25"). It has 8-32 imperial thread mount (to mount in breadboard or other components). Screws are metal and 100 TPI. High quality. 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.