Fangrui Product Details View Is Also Expanded, Which Is Not Only Comfortable To Watch, But Also Has A Wider Field Of View And Clearer Imaging. Product Description: Magnification: 25x Field Of View: 12mm Mounting Size (in Diameter): 23.2mm Lens Material: Glass Shell: Metal Microscope: Biological Microscope Special Reminder: This Eyepiece Is Equipped With Professional Biological Microscopes, With A Diameter Of 23.2mm. Not All Microscopes Can Be Used. Please Do Not Buy This Eyepiece If You Use A Toy Microscope! (the Diameter Of The Simple And Toy Microscopes On The Market Is 20mm Or Other Sizes, Which Does Not Match This Eyepiece) Please Allow 0-2mm Error Due To Manual Measurement. Due To The Difference Between Different Monitors, The Picture May Not Reflect The Actual Color Of The Item. Thank You! Material: Metal Colour: Black Package Contents: 1 X Biological Microscope Eyepiece 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