Welcome to our store! Usage: Suitable for objective lenses with a 42mm/1.65in diameter and connection posts with a 22mm/0.87in diameter, featuring a 135mm/5.31in center distance. Functional Microscope Accessory: This adjustable microscope focus holder helps easily adjust the focus, allowing you to observe objects clearly. Heavy-Duty Structure: The focus stand bracket is constructed from high-strength alloy material, ensuring a robust build, wear resistance, and resistance to deformation. Long Service Life: Exquisite workmanship ensures stable and reliable performance for microscope camera lens lifting, providing a long service life. Optimal Performance: This focus arm bracket has been extensively tested for high performance and strong reliability, allowing you to use your camera steadily. Item Type: Adjustable Focus Holder Material: Alloy Applicable Objective Lens Diameter: Approx. 42mm/1.65in Applicable Connection Post DIA: Approx. 22mm/0.87in Center Distance: Approx. 135mm/5.31in Your 100% satisfaction is our top priority. We are committed to providing you with the best service. If you encounter any issues upon receiving the product, such as damage or incorrect quantity, please contact us immediately, and we will provide you with the best solution!