Oriel model 16021 linear stage. Super smooth action with ball bearings riding on dual steel rods

1/4-20 holes spaced 1" apart. Nice shape, has a modification so you can attach the micrometer to one side instead of centered. Also has 3 extra holes drilled on the same side for attaching an unknown component.

Come with Mitutoyo micrometer with ratchet knob on end. 1" travel.

I combine ship to keep costs down.