This is a focus rack with tail for major brand stereo microscopes. It comes with a 3-1/4" (84mm) diameter of annular ring that holds microscope head.

Features & Specifications:

• Brand new pin-tail focus rack
• Good for major brand stereo microscopes
• Focus gear with coarse focus and tension adjustment
• Diameter of annular ring holding microscope head: 3-14" (84mm)
• Diameter of the pin tail: 5/8" (16mm)Weight: 2 lbs
• Manufactured under ISO 9001 Quality Control Standard