Feature: 1. Multi-functional adapter of stereo microscope and biological microscope with long service life. 2. The C-type installation method is adopted, and the installation and replacement method is simple. It is suitable for a biological microscope with an outer diameter of 23.2mm. 3. Exquisite workmanship, stable and reliable performance, easy to observe the internal structure of small objects. 4. Selected high-quality metal materials, with good durability and stability. 5. With 30mm and 30.5mm adapter rings, the accessories are complete and have strong practicality. Specification: Condition: 100% Brand New Item Type: Microscope Adapter Material: Metal Applicable Biological Microscope Outer Diameter: Approx. 23.2mm / 0.9in Adapter Ring Diameter: Approx. 30mm / 1.18in, 30.5mm / 1.2in . Package List: 1 x Microscope Camera C-Mount Adapter 1 x 30mm Adapter Ring1 x 30.5mm Adapter Ring Note: 1. Please allow 0-2 cm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.