New Nikon SMZ-U stereo microscope coaxial illuminator.  Included are the illuminator intermediate piece, 6 volt 20 watt lamp socket, 6 volt 20 watt lamp, and objective lens glass protector. This item allows on-axis, shadow-free illumination on a stereo microscope.  It has the added benefit of increasing the magnification range of the microscope by 1.5X without decreasing working distance! The old Nikon number is 83030 and the new number is MNB25900.  Each unit will come in the original factory box with packing and is guaranteed to be absolutely mint, never used. The current list price of this unit is $2,640.00.  The bottom dovetail is 59.80mm and the top dovetail opening is 66.55 mm.  This unit is specific to the Nikon SMZ-U and is NOT know to fit other microscopes.