AmScope MSA Graduated Mechanical Stage for Compound Microscopes
This is a brand new graduated mechanical stage attachment for compound microscopes. It is designed to hold industry standard microscope slides. It has a center mount screw with 2 locating pins at 33 mm apart. Its extended length is 160mm and width 135mm.  Features & Specifications :  Two Locating Pins: 33 mm apart Extended Length: 160mm Extended Width: 135 mm