These optical rail carriers are in good condition with cosmetic wear (mostly scratches) along the top portion of the carriers. They contain a center bore with 16M threads, and 2 M6 thread holes on both sides of the bore. You can lock in the rail using a knob that steadily pulls the carrier into place (has 7mm travel). The carrier is 90mm x 65mm x 27mm ( L x W x H ).
90 x 65 x 27mm (L x W x H)
Center Bore: 16M
Other Threads: 6M
Lockable Positioning (7mm Travel)
Melles Griot Optical Rail Carrier, for 60mm Rails, 16M Center Bore