Check the listing for details. Bausch & Lomb Microscope Tension Dial PARTS ONLY NOT WORKING. Condition: Used. Listed at 34.99 USD. The Bausch & Lomb Microscope Tension Dial is a specific part of a microscope designed to control the tension for precise focus and imaging. This particular product is being offered as parts only, indicating that it may not be functioning properly. It is a component that would typically be used in scientific research or educational settings where microscopes are used for precise examination of samples. For parts only