Low Profile Aluminium Translation Stages 7T167 provide single axis movement. Items are fixed on a platform by M6 tapped holes. The stages have a central Ø50 mm (2 Inch) clear aperture, which remains unobstructed over some 15 mm of travel. You close the aperture with an insert platform - laid against the resting flange. The insert platform provides additional mounting holes, which you can rotate. It is locked by two fixing screws. Translation stages could be stacked directly in XY configuration. Angle bracket 2AB167-25, gives possibility to stack Z-axis.

The difference between 7T167M-25 and 7T167-25 is that "M" models
like 7T167M-25 are "mirror" ("right-handed") versions of 7T167-25.