Mini Rail System Ball Slide Positioner 7T8-01 and 7T8-02 has a travel range 5 mm. Using the micrometer driving screw mounted into M10x1 tapped hole, the resolution 10 µm is achieved. Positioners have adapters for mounting onto Mini Optical Rail System rails and could be locked in a position using a fixation screw. With a help of Rail Carriers the Mini Rail System Ball Slide Positioner 7T8-01 could be coarsely positioned in 30 mm travel range. With two 7T8-01 and one 7T8-02 you may stack the X-Y-Z applications directly. Steel Optical Rails 2OR6 for building optical bench or precise optical rail system suitable for these precise positioners.