QIOPTIQ LM2 OPTIC MOUNT + 0,5" (12,7mm) square mirror Description: removed from High School lab (laser R D). High end mirror/lens mount to hold little lenses (one or several!) It holds up to 0,5" Ø lenses (tested good from 12,7mm to around 7mm... even smaller if you get longer locking screws). It has a row of 7 locking screws with plastic tip to avoid damage to optics (5 screws included). Locking screws can be moved from one hole to another if needed, so I doubt you will ever need more screws. At the bottom it has 1/4-20 threaded holes (typical tripod thread). Measures in pics or link (back design of mount differs a bit from drawings, but measures are otherwise good). More info (manufacturer): https://www.qioptiq-shop.com/en/Optomechanics/LINOS-Kinematic-Mirror-Mounts/Lees-Kinematic-Mirror-Mounts/LM2-Optic-Mount.html Condition: normal usage marks in mount, but otherwise excellent condition. Of course, no missing parts (all stainless rolling balls and springs are in place and in good condition). Little mirror seems totally hazed (not typical mirror looking with 100% reflectivity), but I dunno if this is normal or just plain damage. Offers: feel free to make offers to me. I will gladly combine shipping. In case you buy several items, ask for invoice before making payment. Returns: I gladly accept returns for full refund (you only pay return shipping costs).