AmScope FR-A1 Stereo Microscope Focusing Rack

This is a focus rack for major brand stereo microscopes like Olympus, Nikon, Zeiss, Leica, etc. It comes with ball bearing and 3" (76mm) diameter of annular ring that holds microscope head. It is brand new in factory sealed box. Features & Specifications: Brand new focus rack with ball bearing Good for major brand stereo microscopes like Olympus, Nikon, Zeiss, Leica and ... Focus gear with coarse focus and tension adjustment Diameter of annular ring holding microscope head: 3" (76mm) Diameter of opening for stand post (arbor): 1-1/4" (32mm) Distance between central line of annular hole and that of microscope body: 5-1/2" (140mm) Focusing distance in vertical direction: 2" (50mm) Shipping Weight: 4 lbs Manufactured under ISO 9001 Quality Control Standard Excellent Five (5) Year Factory Warranty