1、Application: Suitable for 42mm/65in diameter objective lens, suitable for 22mm/0.87in diameter connecting pillar, with 135mm/31in center distance. 2、Functional Microscope Accessory: The microscope adjustable focus holder helps to easily adjust the focus so that you can observe the object clearly. 3、Heavy Duty Structure: Focus stand bracket is constructed of high strength alloy material, rugged construction, wearproof, not easy to deform. 4、Long Service Life: Exquisite workmanship, microscope camera lens lift bracket performance is stable and reliable, has long service life. 5、Optimum Performance:: This focus arm bracket has been extensively tested, high performance, strong reliability, allowing you to operate the camera steadily. 1 x Adjustable Focus Holder Item Type: Adjustable Focus HolderMaterial: AlloyApplicable Objective Lens Diameter: Approx. 42mm/ 1.65inApplicable Connecting Pillar DIA: Approx. 22mm/ 0.87inCenter Distance: Approx. 135mm/ 5.31in