Feature:    1. Large Size Focusing Knobs: There are simple large size focusing knobs on both sides of the focusing frame. There is steel gear on the focusing frame, which is stable and accurate when adjusting. 2. Standard Size Design: Microscope camera stand holder, with standard size focusing frame, suitable for 50mm / 2.0in diameter microscope lens. 3. Product Size: 50mm / 2.0in connecting objective lens diameter, 25mm / 1.0in connecting pillar diameter, 140mm / 5.5in center distance. 4. Manufacturing Material: Made of high quality alloy and steel, it is strong and durable, which undoubtedly can effectively prolong its service life. 5. Simple Operation: Simple to operate, easy to use, easy to install and disassemble. Without any difficult requirements even though you use it for the first time. Specification: Item Type: Stereo Microscope Holder Weight: Approx.800g / 28.2oz Material: Alloy, Steel Purpose: Suitable For Microscope Lens With 50mm / 2.0in Diameter  Connecting Objective Lens Diameter: Approx.50mm / 2.0in Connecting Pillar Diameter: Approx.25mm / 1.0in Center Distance: Approx.140mm / 5.5in Color: Black Package List: 1 x Microscope Adjustable Stand Note: Do not place the product in an environment with excessive corrosion, humidity and high temperature.