Quality assurance: Our accessory is made of high-quality aluminum alloy material, which is sturdy, durable, and of high quality Ease-of-Use: Designed with user convenience in mind, this large-sized focusing knobs on both sides of the focusing holder. This way, the user can easily operate and adjust the microscope for optimal viewing without unneeded complexities or delays in the adjustment process. Enhancing Your Microscopy Experience: enables easy focusing adjustments and microscope maneuvering. Get clear visuals every time no matter the surface it's placed on. Ultimate Microscope Accessory: is an essential tool for anyone using a microscope, be it professional use or for hobbyist purposes. it also adds to the efficiency, comfort, and convenience in using microscopes. Colour:black Material:Aluminum alloy Package Contents: 1 x Microscope Accessories 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.