Choose from a pillar diameter of either 25mm or 32mm to suit your specific microscope setup needs. This flexibility ensures a and stable support for various microscope models. Featuring a 3-inch (76mm) diameter annular ring, this holder securely accommodates microscope heads, providing a firm and reliable setup for detailed scientific observations and research. Description/Features: The Microscope Stand Holder is designed for stability and in microscopy applications. It features a robust focus rack with ball bearings for smooth adjustments and a focus gear with coarse focus and tension control, ensuring accurate positioning and stability of the microscope head. Specifications: Focus Rack: Equipped with ball bearing for smooth operation. Focus Gear: Includes coarse focus and tension adjustment. Diameter of Annular Ring: 3Inch (76mm) to hold the microscope head securely. Color:Black Material:Aluminium Package Contents: 1 * Microscope stand Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.